===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT



                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934



       Date of Report (Date of earliest event reported): December 9, 1998
                                                         ----------------


                              M&T BANK CORPORATION
              -----------------------------------------------------
             (Exact name of registrant as specified in its charter)



                                    New York
                  ---------------------------------------------
                 (State or other jurisdiction of incorporation)



         001-9861                                       16-0968385
- ------------------------                     -----------------------------------
(Commission File Number)                    (I.R.S. Employer Identification No.)



      One M&T Plaza, Buffalo, New York                           14203
 ---------------------------------------                      ----------
(Address of principal executive offices)                      (Zip Code)


Registrant's telephone number, including area code:  (716) 842-5445
                                                     --------------

                                (NOT APPLICABLE)
           ------------------------------------------------------------
          (Former name or former address, if changed since last report)


===============================================================================






Item 5.    Other Events.


           On December 9, 1998, M&T Bank Corporation ("MTB") announced that it
had entered into a definitive agreement with FNB Rochester Corp. ("FNB"),
Rochester, New York, pursuant to which FNB, a bank holding company, will be
acquired by MTB upon the satisfaction of a number of conditions. Upon
consummation of the transaction, First National Bank of Rochester, FNB's
national bank subsidiary, will be merged into Manufacturers and Traders Trust
Company ("M&T Bank"), MTB's principal commercial bank subsidiary.

           First National Bank of Rochester operates 19 banking offices in
western and central New York State. At September 30, 1998, FNB reported
approximately $568 million in assets. FNB's common stock is registered pursuant
to Section 12(g) of the Securities Exchange Act of 1934, as amended (File No.
000-13423). Additional information concerning FNB is on file with the Securities
and Exchange Commission.

           Each share of FNB Common Stock outstanding at the time the
acquisition is consummated will be converted into either 0.06766 of a share of
common stock of MTB (and cash in lieu of fractional shares) or the right to
receive $33.00 in cash as provided in the Agreement and Plan of Merger, dated as
of December 9, 1998, by and among FNB, MTB and MTB's wholly-owned subsidiary,
Olympia Financial Corp. ("Olympia"), providing for the merger (the "Merger") of
FNB with and into Olympia (the "Plan of Merger"), set forth as Annex A to the
Agreement and Plan of Reorganization (the "Reorganization Agreement" and,
together with the Plan of Merger, the "Merger Agreements"), dated as of December
9, 1998, by and among MTB, FNB and Olympia. A copy of the Reorganization
Agreement is filed as Exhibit 99.1 hereto and is incorporated herein by
reference. Subject to possible adjustments set forth in the Plan of Merger, the
total number of shares of FNB Common Stock to be converted into shares of common
stock of MTB in the acquisition shall be 50% of the 3,625,806 shares of FNB
Common Stock outstanding on December 9, 1998, less 50% of the number of shares
of FNB Common Stock acquired by MTB or FNB prior to the effective date of the
Merger. The right to receive shares of common stock of MTB is subject to the
allocation and proration procedures set forth in the Plan of Merger.

           Consummation of the transaction is subject to a number of conditions,
including regulatory approvals and the approval of FNB's stockholders. Subject
to the satisfaction of all conditions, it is anticipated that the transaction
will be completed in early 1999.

           Following the consummation of the transaction, Mr. Michael J.
Falcone, chairman of the board of directors of FNB, and Mr. R. Carlos
Carballada, president and chief executive officer of FNB, will be elected
directors of MTB and M&T Bank.

                                      -2-





           MTB management has estimated that upon the achievement of the fully
phased-in cost savings expected to result from the Merger (which are expected to
accrue over a period of months following consummation of the Merger), the impact
of the Merger (exclusive of one-time Merger-related charges) will be an
accretion to cash earnings per share of approximately 2% to 3% and an accretion
to GAAP earnings per share of approximately 1%. Based upon the projected timing
of consummation (and again excluding one-time Merger-related charges), MTB
management has estimated that the Merger will not result in any appreciable
change in cash earnings per share in 1999 and will dilute 1999 GAAP earnings per
share by approximately 1%. Factors that may cause actual results to differ from
these forward-looking statements include, among others, the following
possibilities: (1) expected cost savings from the Merger cannot be fully
realized within the expected time frame; (2) revenues following the Merger are
lower than expected; (3) costs or difficulties related to the integration of the
business of MTB and FNB are greater than expected; or (4) other "Future Factors"
enumerated in MTB's Annual Report on Form 10-K for the year ended December 31,
1997. MTB assumes no responsibility to update these forward-looking statements
after the date hereof.

           Contemporaneous with the execution and delivery of the definitive
agreement described above, FNB granted MTB a stock option (the "Stock Option")
to acquire up to 19.9% of the outstanding shares of common stock of FNB under
certain conditions. A copy of the Stock Option Agreement, dated as of December
9, 1998, by and between MTB and FNB granting the Stock Option is filed as
Exhibit 99.2 hereto and is incorporated herein by reference.

         In addition, in connection with the Merger, each member of the Board of
Directors of FNB, each in his or her capacity as a shareholder of such company,
has agreed with MTB to vote or cause to be voted for approval of the Merger
Agreements all of his or her shares which he or she is entitled to vote with
respect thereto. In addition, each of such persons has agreed not to transfer or
otherwise dispose of his or her shares of FNB Common Stock prior to shareholder
approval of the Merger Agreements or termination of the Merger Agreements
pursuant to the terms thereof. Each such person has also agreed not to take any
action that would substantially impair the prospects of completing the Merger
pursuant to the Merger Agreements. The form of Voting Agreement is filed as
Exhibit 99.3 hereto and incorporated herein by reference.

           The press release issued by MTB and FNB with respect to the
announcement of the transaction described herein is filed as Exhibit 99.4 hereto
and incorporated herein by reference.

           The foregoing descriptions of and references to all of the
above-mentioned agreements and documents are qualified in their entirety by
reference to the complete texts of the agreements and documents that are filed
herewith and incorporated herein by reference.

                                      -3-






Item 7.  Financial Statements and Exhibits

The following exhibits are filed herewith:


           Exhibit No.

           99.1     Agreement and Plan of Reorganization dated as of December 9,
                    1998, by and among M&T Bank Corporation, Olympia Financial 
                    Corp. and FNB Rochester Corp.

           99.2     Stock Option Agreement dated as of December 9, 1998 by and 
                    between M&T Bank Corporation and FNB Rochester Corp.

           99.3     Form of Voting Agreement between the Directors of FNB
                    Rochester Corp. and M&T Bank Corporation, dated as of
                    December 9, 1998.

           99.4     Joint Press Release, dated December 9, 1998.




                                   SIGNATURES


           Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                            M&T BANK CORPORATION



                                            By: /s/ Michael P. Pinto
                                                ---------------------------
Date: December 17, 1998                         Michael P. Pinto
                                                Executive Vice President
                                                and Chief Financial Officer


                                      -4-







                                 CURRENT REPORT



                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934



Report Dated: December 9, 1998          Commission File Number: 001-9861
              ----------------                                  --------



                              M&T BANK CORPORATION
             (Exact name of registrant as specified in its charter)


                                    EXHIBITS



                                      -5-







                                  EXHIBIT INDEX


           Exhibit No.
           -----------

           99.1.           Agreement and Plan of Reorganization dated as of
                           December 9, 1998, by and among M&T Bank Corporation,
                           FNB Rochester Corp. and ONBANCorp, Inc.

           99.2.           Stock Option Agreement dated as of December 9, 1998
                           by and between M&T Bank Corporation and FNB Rochester
                           Corp.

           99.3.           Form of Voting Agreement between the Directors of 
                           FNB Rochester Corp. and M&T Bank Corporation, dated 
                           as of December 9, 1998.

           99.4.           Joint Press Release, dated December 9, 1998.



                                                                    Exhibit 99.1

                      AGREEMENT AND PLAN OF REORGANIZATION

         AGREEMENT AND PLAN OF REORGANIZATION ("Reorganization Agreement" or
"Agreement") dated as of December 9, 1998, by and among FNB ROCHESTER CORP.
("FNB"), a New York corporation having its principal executive office at 35
State Street, Rochester, New York, 14614, M&T BANK CORPORATION ("M&T"), a New
York corporation having its principal executive office at One M&T Plaza,
Buffalo, New York, 14240, and OLYMPIA FINANCIAL CORP. ("Merger Sub"), a Delaware
corporation having its registered office at 1209 Orange Street, Wilmington,
Delaware.

                                   WITNESSETH

         WHEREAS, the parties hereto desire that FNB shall be acquired by M&T
through the merger ("Merger") of FNB with and into Merger Sub, with Merger Sub
as the surviving corporation ("Surviving Corporation") pursuant to an Agreement
and Plan of Merger substantially in the form attached hereto as Annex A ("Plan
of Merger"); and

         WHEREAS, following the consummation of the Merger, First National Bank
of Rochester ("FNB Bank"), a national banking association subsidiary of FNB,
shall merge with and into Manufacturers and Traders Trust Company ("M&T Bank"),
a New York-chartered commercial bank subsidiary of M&T ("Bank Merger"), pursuant
to an Agreement and Plan of Merger ("Bank Merger Agreement") in a form to be
specified by M&T; and

         WHEREAS, the parties hereto desire to provide for certain undertakings,
conditions, representations, warranties and covenants in connection with the
transactions contemplated hereby;

         NOW, THEREFORE, in consideration of the premises and of the mutual
representations, warranties and covenants herein contained and intending to be
legally bound hereby, the parties hereto do hereby agree as follows:

                                   ARTICLE 1.
                                   DEFINITIONS

         1.1 "Bank Holding Company Act" shall mean the Bank Holding Company Act
of 1956, as amended.

         1.2 "Banking Board" shall mean the New York State Banking Board.

         1.3 "Bank Merger" is defined in the recitals hereto.

         1.4 "Bank Merger Agreement" is defined in the recitals hereto.

         1.5 "Claim" is defined in Section 4.11(d) hereof.

         1.6 "Closing Date" shall mean the date specified pursuant to Section
4.9 hereof as the date on which the parties hereto shall close the transactions
contemplated herein.



                                     - 1 -


         1.7 "Code" shall mean the Internal Revenue Code of 1986, as amended.

         1.8 "Commission" or "SEC" shall mean the Securities and Exchange
Commission.

         1.9 "Confidentiality Agreements" is defined in Section 4.5 hereof.

         1.10 "Effective Date" shall mean the date specified pursuant to Section
4.9 hereof as the effective date of the Merger.

         1.11 "ERISA" shall mean the Employee Retirement Income Security Act of
1974, as amended.

         1.12 "ERISA Affiliate" is defined in Section 3.10 hereof.

         1.13 "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended.

         1.14 "FDIA" shall mean the Federal Deposit Insurance Act.

         1.15 "FDIC" shall mean the Federal Deposit Insurance Corporation.

         1.16 "Federal Reserve Board" shall mean the Board of Governors of the
Federal Reserve System.

         1.17 "FNB" is defined in the preamble of this Agreement.

         1.18 "FNB Bank" is defined in the recitals hereto.

         1.19 "FNB Common Stock" is defined in Section 2.1 hereof.

         1.20 "FNB Employees" is defined in Section 4.11(a) hereof.

         1.21 "FNB Financial Statements" shall mean (i) the consolidated balance
sheets of FNB as of September 30, 1998 and as of December 31, 1997 and 1996 and
the related consolidated statements of income, cash flows and changes in
shareholders' equity (including related notes, if any) for the nine months ended
September 30, 1998 and each of the three years ended December 31, 1997, 1996 and
1995, respectively, as filed by FNB in SEC Documents and (ii) the consolidated
balance sheets of FNB and related consolidated statements of income, cash flows
and changes in shareholders' equity (including related notes, if any) as filed
by FNB in SEC Documents with respect to periods ended subsequent to September
30, 1998.

         1.22 "FNB Plan" is defined in Section 2.13(a) hereof.

         1.23 "FNB Preferred Stock" is defined in Section 2.1 hereof.

         1.24 "Indemnified Parties" is defined in Section 4.11(d) hereof.

         1.25 "Insurance Amount" is defined in Section 4.11(f) hereof.



                                     - 2 -


         1.26 "Intellectual Property" means domestic and foreign letters patent,
patents, patent applications, patent licenses, software licensed or owned,
know-how licenses, trade names, common law and other trademarks, service marks,
licenses of trademarks, trade names and/or service marks, trademark
registrations and applications, service mark registrations and applications and
copyright registrations and applications.

         1.27 "M&T" is defined in the preamble of this Agreement.

         1.28 "M&T Bank" is defined in the recitals hereto.

         1.29 "M&T Common Stock" is defined in Section 3.1 hereof.

         1.30 "M&T Financial Statements" shall mean (i) the consolidated balance
sheets of M&T as of September 30, 1998 and as of December 31, 1997 and 1996 and
the related consolidated statements of income, cash flows and changes in
shareholders' equity (including related notes, if any) for the nine months ended
September 30, 1998 and each of the three years ended December 31, 1997, 1996 and
1995, respectively, as filed by M&T in SEC Documents and (ii) the consolidated
balance sheets of M&T and related consolidated statements of income, cash flows
and changes in shareholders' equity (including related notes, if any) as filed
by M&T in SEC Documents as of dates or with respect to periods ended subsequent
to September 30, 1998.

         1.31 "M&T Plan" is defined in Section 3.10 hereof.

         1.32 "M&T Preferred Stock" is defined in Section 3.1 hereof.

         1.33 "Material Adverse Effect" shall mean, with respect to FNB or M&T,
as the case may be, a material adverse effect on the business, results of
operations or financial condition of such party and any Subsidiary of the party
taken as a whole or a material adverse effect on such party's ability to
consummate the transactions contemplated hereby; provided, however, that in
determining whether a Material Adverse Effect has occurred there shall be
excluded any effect on the referenced party the cause of which is (i) any change
in banking or similar laws, rules or regulations of general applicability or
interpretations thereof by courts or governmental authorities, (ii) any change
in generally accepted accounting principles or regulatory accounting
requirements applicable to banks, thrifts or their holding companies generally
and (iii) any action or omission of FNB or M&T or any Subsidiary of either of
them taken with the prior written consent of M&T or FNB, as applicable, in
contemplation of the Merger.

         1.34 "Merger" is defined in the recitals hereto.

         1.35 "Merger Sub" is defined in the preamble of this Agreement.

         1.36 "NYSE" shall mean the New York Stock Exchange.

         1.37 "OCC" shall mean the Office of the Comptroller of Currency.



                                     - 3 -


         1.38 "Option Agreement" shall mean the Stock Option Agreement dated of
even date herewith between FNB and M&T pursuant to which FNB will grant M&T the
right to purchase certain shares of FNB Common Stock.

         1.39 "Plan of Merger" is defined in the recitals hereto.

         1.40 "Previously Disclosed" shall mean disclosed prior to the execution
hereof in (i) an SEC Document filed with the SEC subsequent to January 1, 1998
and prior to the date hereof or (ii) a letter dated of even date herewith from
the party making such disclosure and delivered to the other party prior to the
execution hereof. Any information disclosed by one party to the other for any
purpose hereunder shall be deemed to be disclosed for all purposes hereunder.
The inclusion of any matter in information Previously Disclosed shall not be
deemed an admission or otherwise to imply that any such matter is material for
purposes of this Agreement.

         1.41 "Proxy Statement" shall mean the proxy statement/prospectus (or
similar documents) together with any supplements thereto sent to the
shareholders of FNB to solicit their votes in connection with this Agreement and
the Plan of Merger.

         1.42 "Registration Statement" shall mean the registration statement
with respect to the M&T Common Stock to be issued in connection with the Merger
as declared effective by the Commission under the Securities Act.

         1.43 "Rights" shall mean warrants, options, rights, convertible
securities and other arrangements or commitments which obligate an entity to
issue or dispose of any of its capital stock, and stock appreciation rights,
performance units and other similar stock-based rights whether they obligate the
issuer thereof to issue stock or other securities or to pay cash.

         1.44 "Reorganization Agreement" is defined in the recitals hereto.

         1.45 "Sandler O'Neill" is defined in Section 2.18 hereof.

         1.46 "SEC Documents" shall mean all reports and registration statements
filed, or required to be filed, by a party hereto pursuant to the Securities
Laws.

         1.47 "Securities Act" shall mean the Securities Act of 1933, as
amended.

         1.48 "Securities Laws" shall mean the Securities Act; the Exchange Act;
the Investment Company Act of 1990, as amended; the Investment Advisers Act of
1940, as amended; the Trust Indenture Act of 1939, as amended; and the rules and
regulations of the Commission promulgated thereunder.

         1.49 "Subsidiary" or "Subidiaries" shall mean with respect to any
party, any bank, corporation, partnership or other organization, whether
incorporated or unincorporated, which is consolidated with such party for
financial reporting purposes; provided, however, with respect to M&T
"Subsidiary" or "Subsidiaries" shall not include First Empire Capital Trust I,
First Empire Capital Trust II or OnBank Capital Trust I.



                                     - 4 -


         1.50 "Surviving Corporation" is defined in the recitals hereto.

         1.51 "Takeover Proposal" is defined in Section 4.7(b)(13) hereof.



                                   ARTICLE 2.
                      REPRESENTATIONS AND WARRANTIES OF FNB

         FNB hereby represents and warrants to M&T and Merger Sub as follows:

         2.1. Capital Structure of FNB

         The authorized capital stock of FNB consists of (i) 2,000,000 shares of
preferred stock, par value $1.00 per share ("FNB Preferred Stock"), none of
which is issued and outstanding, and (ii) 5,000,000 shares of common stock, par
value $1.00 per share ("FNB Common Stock"), of which, as of the date hereof,
3,625,806 shares are issued and outstanding and no shares are held in treasury.
As of the date hereof, no shares of FNB Preferred Stock or FNB Common Stock are
reserved for issuance, except that (i) 42,577 shares of FNB Common Stock are
reserved for issuance pursuant to FNB's employee stock purchase plan, (ii)
509,287 shares of FNB Common Stock are reserved for issuance upon the exercise
of stock options heretofore granted pursuant to FNB's stock option plans, (iii)
23,355 shares of FNB Common Stock are reserved for issuance pursuant to FNB's
401(k) stock purchase plan, and (iv) 721,535 shares of FNB Common Stock are
reserved for issuance pursuant to the Option Agreement. Schedule 2.1 hereto sets
forth all currently outstanding options for the purchase of FNB Common Stock,
the number of shares of FNB Common Stock subject to such options, whether such
options are vested or unvested, the vesting schedule for unvested options and
the vesting or other treatment of all unvested options in the event of a change
of control of FNB. All outstanding shares of FNB Common Stock have been duly
authorized and validly issued and are fully paid and nonassessable. FNB does not
have and is not bound by any Rights which are authorized, issued or outstanding
with respect to the capital stock of FNB except (i) for the Option Agreement,
(ii) as Previously Disclosed, and (iii) as set forth above. None of the shares
of FNB's capital stock has been issued in violation of the preemptive rights of
any person.

         2.2. Organization, Standing and Authority of FNB

         FNB is a duly organized corporation, validly existing and in good
standing under the laws of New York with full corporate power and authority to
carry on its business as now conducted and is duly licensed or qualified to do
business in the states of the United States and foreign jurisdictions where its
ownership or leasing of property or the conduct of its business requires such
qualification, except where the failure to be so licensed or qualified would not
have a Material Adverse Effect on FNB. FNB is registered as a bank holding
company under the Bank Holding Company Act.


                                     - 5 -


         2.3. Ownership of FNB Subsidiaries; Capital Structure of FNB
Subsidiaries

         As of the date hereof, FNB does not own, directly or indirectly, 5% or
more of the outstanding capital stock or other voting securities of any
corporation, bank or other organization except the FNB Subsidiaries as
Previously Disclosed. Except as Previously Disclosed, the outstanding shares of
capital stock or other equity interests of each FNB Subsidiary have been duly
authorized and validly issued and are fully paid and (except as provided by
applicable law) nonassessable and all such shares or equity interests are
directly or indirectly owned by FNB free and clear of all liens, claims and
encumbrances. No FNB Subsidiary has or is bound by any Rights which are
authorized, issued or outstanding with respect to the capital stock or other
equity interests of any FNB Subsidiary and, except as Previously Disclosed,
there are no agreements, understandings or commitments relating to the right of
FNB to vote or to dispose of said shares. None of the shares of capital stock or
other equity interests of any FNB Subsidiary has been issued in violation of the
preemptive rights of any person.

         2.4. Organization, Standing and Authority of FNB Subsidiaries

         Each FNB Subsidiary is a duly organized corporation, banking
association or other organization, validly existing and in good standing under
applicable laws. Each FNB Subsidiary (i) has full power and authority to carry
on its business as now conducted, and (ii) is duly licensed or qualified to do
business in the states of the United States and foreign jurisdictions where its
ownership or leasing of property or the conduct of its business requires such
licensing or qualification, except where failure to be so licensed or qualified
would not have a Material Adverse Effect on FNB. Each FNB Subsidiary has all
federal, state, local and foreign governmental authorizations necessary for it
to own or lease its properties and assets and to carry on its business as it is
now being conducted, except where the failure to be so authorized would not have
a Material Adverse Effect on FNB. FNB Bank is a member in good standing of the
Federal Home Loan Bank of New York and owns the requisite amount of shares
therein and is a qualified seller and servicer for the Federal Home Loan
Mortgage Corporation. FNB Capital Corp. is a real estate investment trust within
the meaning of Part II of Chapter 1M of Subtitle A of the Code.

         2.5. Authorized and Effective Agreement

                  (a) FNB has all requisite corporate power and authority to
enter into and perform all of its obligations under this Reorganization
Agreement, the Plan of Merger and the Option Agreement. The execution and
delivery of this Reorganization Agreement, the Plan of Merger and the Option
Agreement and the consummation of the transactions contemplated hereby and
thereby have been duly and validly authorized by all necessary corporate action
in respect thereof on the part of FNB, except that the affirmative vote of the
holders of two-thirds of the shares of FNB stock cast by the holders of such
shares entitled to vote thereon is the only shareholder vote required to approve
the Plan of Merger pursuant to the New York Business Corporation Law and FNB's
Certificate of Incorporation, as amended, and FNB's Bylaws. The Board of
Directors of FNB has directed that this Agreement and the Plan of Merger be
submitted to FNB's stockholders for approval at a special meeting to be held as
soon as practicable.

                                     - 6 -


                  (b) Assuming the accuracy of the representation contained in
Section 3.5(b) hereof, this Reorganization Agreement and the Plan of Merger
constitute legal, valid and binding obligations of FNB, enforceable against it
in accordance with their respective terms, subject as to enforceability, to
bankruptcy, insolvency and other laws of general applicability relating to or
affecting creditors' rights and to general equity principles.

                  (c) Except as Previously Disclosed, neither the execution and
delivery of this Reorganization Agreement, the Plan of Merger or the Option
Agreement, nor consummation of the transactions contemplated hereby or thereby,
nor compliance by FNB with any of the provisions hereof or thereof shall (i)
conflict with or result in a breach of any provision of the articles or
certificate of incorporation or association, charter or bylaws of FNB or any FNB
Subsidiary, (ii) assuming the consents and approvals contemplated by Section 4.3
hereof and the consents and approvals which are Previously Disclosed are duly
obtained, constitute or result in a breach of any term, condition or provision
of, or constitute a default under, or give rise to any right of termination,
cancellation or acceleration with respect to, or result in the creation of any
lien, charge or encumbrance upon any property or asset of FNB or any FNB
Subsidiary pursuant to, any note, bond, mortgage, indenture, license, agreement
or other instrument or obligation, or (iii) assuming the consents and approvals
contemplated by Section 4.3 hereof and the consents and approvals which are
Previously Disclosed are duly obtained, violate any order, writ, injunction,
decree, statute, rule or regulation applicable to FNB or any FNB Subsidiary,
except (in the case of clauses (ii) and (iii) above) for such violations,
rights, conflicts, breaches, creations or defaults which, either individually or
in the aggregate, would not have a Material Adverse Effect on FNB.

                  (d) Other than as contemplated by Section 4.3 hereof and
except as Previously Disclosed, no consent, approval or authorization of, or
declaration, notice, filing or registration with, any governmental or regulatory
authority, or any other person, is required to be made or obtained by FNB or any
FNB Subsidiary on or prior to the Closing Date in connection with the execution,
delivery and performance of this Agreement and the Plan of Merger or the
consummation of the transactions contemplated hereby or thereby. Neither FNB nor
any FNB Subsidiary is aware of any reason why the conditions set forth in
Section 5.1(b) of this Agreement will not be satisfied without undue delay and
without the imposition of any condition or requirement of the type referred to
in the provisions thereof.

         2.6. SEC Documents; Regulatory Filings

         FNB has filed all SEC Documents required by the Securities Laws and
such SEC Documents complied, as of their respective dates, in all material
respects with the Securities Laws. FNB and each FNB Subsidiary has filed all
reports required by statute or regulation to be filed with any federal or state
bank regulatory agency, except where the failure to so file would not have a
Material Adverse Effect on FNB, and such reports were prepared in accordance
with the applicable statutes, regulations and instructions in existence as of
the date of filing of such reports in all material respects.


                                     - 7 -


         2.7. Financial Statements; Books and Records; Minute Books

         The FNB Financial Statements filed by FNB in SEC Documents prior to the
date of this Agreement fairly present, and the FNB Financial Statements filed by
FNB after the date of this Agreement will fairly present the consolidated
financial position of FNB and its consolidated Subsidiaries as of the dates
indicated and the consolidated results of operations, changes in shareholders'
equity and cash flows of FNB and its consolidated Subsidiaries for the periods
then ended and each such financial statement has been or will be, as the case
may be, prepared in conformity with generally accepted accounting principles
applicable to financial institutions applied on a consistent basis except as
disclosed therein and except in the case of unaudited statements, as permitted
by Form 10-Q. The books and records of FNB and each FNB Subsidiary fairly
reflect in all material respects the transactions to which it is a party or by
which its properties are subject or bound. Such books and records have been
properly kept and maintained and are in compliance with all applicable legal and
accounting requirements in all material respects. The minute books of FNB and
each FNB Subsidiary contain records which are accurate in all material respects
of all corporate actions of its shareholders and Board of Directors (including
committees of its Board of Directors).

         2.8. Material Adverse Change

         FNB has not, on a consolidated basis, suffered any change in its
financial condition, results of operations or business since December 31, 1997
which individually or in the aggregate with any other such changes would
constitute a Material Adverse Effect with respect to FNB.

         2.9. Absence of Undisclosed Liabilities

         Neither FNB nor any FNB Subsidiary has any liability (contingent or
otherwise), excluding contractually assumed contingencies, that is material to
FNB on a consolidated basis, or that, when combined with all similar
liabilities, would be material to FNB on a consolidated basis, except as
Previously Disclosed, as disclosed in the FNB Financial Statements filed with
the SEC prior to the date hereof and except for liabilities incurred in the
ordinary course of business subsequent to September 30, 1998.

         2.10. Properties

         FNB and the FNB Subsidiaries have good and marketable title free and
clear of all liens, encumbrances, charges, defaults or equitable interests to
all of the properties and assets, real and personal, which, individually or in
the aggregate, are material to the business of FNB and its Subsidiaries taken as
a whole, and which are reflected on the FNB Financial Statements as of September
30, 1998 or acquired after such date, except (i) liens for taxes not yet due and
payable, (ii) pledges to secure deposits and other liens incurred in the
ordinary course of banking business, (iii) such imperfections of title,
easements and encumbrances, if any, as are not material in character, amount or
extent and (iv) dispositions and encumbrances for adequate consideration in the
ordinary course of business. All leases pursuant to which FNB or any FNB
Subsidiary, as lessee, leases real and personal property which, individually or
in the aggregate, are material to the business of FNB and its Subsidiaries taken
as a whole are valid and enforceable in accordance with their respective terms
except where the failure of such lease or leases to be valid and enforceable
would not, individually or in the aggregate, have a Material Adverse Effect on
FNB.

         2.11. Loans

                  (a) Each loan reflected as an asset in the FNB Financial
Statements (i) is evidenced by notes, agreements or other evidences of
indebtedness which are true, genuine and what they purport to be, (ii) to the
extent secured, has been secured by valid liens and security interests which
have been perfected, and (iii) is the legal, valid and binding obligation of the
obligor named therein, enforceable in accordance with its terms, subject to
bankruptcy, insolvency, fraudulent conveyance and other laws of general
applicability relating to or affecting creditors' rights and to general equity
principles, in each case other than loans as to which the failure to satisfy the
foregoing standards would not have a Material Adverse Effect on FNB.

                  (b) The allowance for loan losses reflected on the FNB
Financial Statements, as of their respective dates, is in all material respects
consistent with the requirements of generally accepted accounting principles to
provide for reasonably anticipated losses with respect to FNB's loan portfolio
based upon information reasonably available at the time.



                                     - 8 -


         2.12. Tax Matters

                  (a) FNB and each FNB Subsidiary have timely filed federal
income tax returns for each year through December 31, 1997 and have timely
filed, or caused to be filed, all other federal, state, local and foreign tax
returns (including, without limitation, estimated tax returns, returns required
under Sections 1441-1446 and 6031-6060 of the Code and the regulations
thereunder and any comparable state, foreign and local laws, any other
information returns, withholding tax returns, FICA and FUTA returns and back up
withholding returns required under Section 3406 of the Code and any comparable
state, foreign and local laws) required to be filed with respect to FNB or any
FNB Subsidiary, except where the failure to file timely such federal income and
other tax returns would not, in the aggregate, have a Material Adverse Effect on
FNB. All taxes due in respect of the periods covered by such tax returns have
been paid or adequate reserves have been established for the payment of such
taxes, except where any such failure to pay or establish adequate reserves would
not, in the aggregate, have a Material Adverse Effect on FNB and, as of the
Closing Date, all taxes due in respect of any subsequent periods (or portions
thereof) ending on or prior to the Closing Date will have been paid or adequate
reserves will have been established for the payment thereof, except where any
such failure to pay or establish adequate reserves would not, in the aggregate,
have a Material Adverse Effect on FNB. Except as Previously Disclosed, no
material (i) audit examination, (ii) deficiency, or (iii) refund litigation with
respect to such returns or periods has been proposed, asserted or assessed or is
pending. Neither FNB nor any FNB Subsidiary will have any liability for any such
taxes in excess of the amounts so paid or reserves or accruals so established
except where such liability would not have a Material Adverse Effect on FNB.

                  (b) All federal, state and local (and, if applicable, foreign)
tax returns filed by FNB and each FNB Subsidiary are complete and accurate in
all material respects. Neither FNB nor any FNB Subsidiary is delinquent in the
payment of any material tax, assessment or governmental charge, and, except as
Previously Disclosed, none of them has requested any extension of time within
which to file any tax returns in respect of any fiscal year or portion thereof
which have not since been filed. Except as Previously Disclosed, no material
deficiencies for any tax, assessment or governmental charge have been proposed,
asserted or assessed (tentatively or otherwise) against FNB or any FNB
Subsidiary which have not been settled and paid. Except as Previously Disclosed,
there are currently no agreements in effect with respect to FNB or any FNB
Subsidiary to extend the period of limitations for the assessment or collection
of any tax.

                  (c) Except as Previously Disclosed, neither the transactions
contemplated hereby nor the termination of the employment of any employees of
FNB or any FNB Subsidiary prior to or following consummation of the transactions
contemplated hereby could result in FNB or any FNB Subsidiary making or being
required to make any "excess parachute payment" as that term is defined in
Section 280G of the Code.

                  (d) Except as Previously Disclosed, neither FNB nor any FNB
Subsidiary is a party to any agreement providing for the allocation or sharing
of, or indemnification for, taxes.

                  (e) Except as Previously Disclosed, neither FNB nor any FNB
Subsidiary is required to include in income any adjustment in any taxable period
ending after the date hereof pursuant to Section 481(a) of the Code.

                  (f) Except as Previously Disclosed, neither FNB nor any FNB
Subsidiary has entered into any agreement with any taxing authority that will
bind M&T or an affiliate thereof after the Closing Date.

                  (g) For purposes of this Section 2.12, references to FNB and
any FNB Subsidiary shall include predecessors thereof.

         2.13. Employee Benefit Plans

                  (a) Schedule 2.13(a) hereto sets forth a true and complete
list of each FNB Plan. For purposes of this Section 2.13, the term "FNB Plan"
means each bonus, deferred compensation, incentive compensation, stock purchase,
stock option, severance pay, medical, life or other insurance, profit-sharing,
or pension plan, program, agreement or arrangement, and each other employee
benefit plan, program, agreement or arrangement, sponsored, maintained or
contributed to or required to be contributed to by FNB or by any trade or
business, whether or not incorporated, that together with FNB would be deemed a
"single employer" under Section 414 of the Code (an "ERISA Affiliate") for the
benefit of any employee or director or former employee or former director of FNB
or any ERISA Affiliate of FNB.

                  (b) With respect to each of the FNB Plans, FNB has made
available to M&T true and complete copies of each of the following documents:
(a) the FNB Plan and related documents (including all amendments thereto); (b)
the most recent annual reports, financial statements, and actuarial reports, if

                                      - 9 -


any; (c) the most recent summary plan description, together with each summary of
material modifications, required under ERISA with respect to such FNB Plan; and
(d) the most recent determination letter received from the IRS with respect to
each FNB Plan that is intended to be qualified under the Code.

                  (c) No liability under Title IV of ERISA has been incurred by
FNB or any ERISA Affiliate of FNB since the effective date of ERISA that has not
been satisfied in full, and no condition exists that presents a material risk to
FNB or any ERISA Affiliate of FNB of incurring a liability under such Title,
other than liability for premium payments to the Pension Benefit Guaranty
Corporation, which premiums have been or will be paid when due.

                  (d) Neither FNB nor any ERISA Affiliate of FNB, nor any of the
FNB Plans, nor any trust created thereunder, nor any trustee or administrator
thereof has engaged in a prohibited transaction (within the meaning of Section
406 of ERISA and Section 4975 of the Code) in connection with which FNB or any
ERISA Affiliate of FNB could, either directly or indirectly, incur a material
liability or cost.

                  (e) Full payment has been made, or will be made in accordance
with Section 404(a)(6) of the Code, of all amounts that FNB or any ERISA
Affiliate of FNB is required to pay under Section 412 of the Code or under the
terms of the FNB Plans.

                  (f) Except as Previously Disclosed, as of the Closing Date,
the then fair market value of the assets held under each FNB Plan that is
subject to Title IV of ERISA will be sufficient so as to permit a "standard
termination" of each such FNB Plan under Section 4042(b) of ERISA without the
need to make any additional contributions to such FNB Plans. No reportable event
under Section 4043 of ERISA has occurred or will occur with respect to any FNB
Plan on or before the Closing Date other than any reportable event occurring by
reason of the transactions contemplated by this Agreement or a reportable event
for which the requirement of notice to the PBGC has been waived.

                  (g) Except as Previously Disclosed, none of the FNB Plans is a
"multiemployer pension plan," as such term is defined in Section 3(37) of ERISA,
a "multiple employer welfare arrangement," as such term is defined in Section
3(40) of ERISA, or a single employer plan that has two or more contributing
sponsors, at least two of whom are not under common control, within the meaning
of Section 4063(a) of ERISA.

                  (h) A favorable determination letter has been issued by the
Internal Revenue Service with respect to the each of the FNB Plans that is
intended to be "qualified" within the meaning of Section 401(a) of the Code to
the effect that such plan is so qualified and each such FNB Plan satisfies the
requirements of Section 401(a) of the Code in all material respects. Each of the
FNB Plans that is intended to satisfy the requirements of Section 125 or
501(c)(9) of the Code satisfies such requirements in all material respects. Each
of the FNB Plans has been operated and administered in all material respects in
accordance with its terms and applicable laws, including but not limited to
ERISA and the Code.

                  (i) There are no actions, suits or claims pending, or, to the
knowledge of FNB, threatened or anticipated (other than routine claims for
benefits) against any FNB Plan, the assets of any FNB Plan or against FNB or any

                                     - 10 -


ERISA Affiliate of FNB with respect to any FNB Plan. There is no judgment,
decree, injunction, rule or order of any court, governmental body, commission,
agency or arbitrator outstanding against or in favor of any FNB Plan or any
fiduciary thereof (other than rules of general applicability). There are no
pending or threatened audits, examinations or investigations by any governmental
body, commission or agency involving any FNB Plan.

                  (j) Except as Previously Disclosed, the consummation of the
transactions contemplated by this Agreement will not (i) entitle any current or
former employee or director of FNB or any ERISA Affiliate of FNB to severance
pay, unemployment compensation or any similar payment, (ii) accelerate the time
of payment or vesting, or increase the amount, of any compensation due to any
such current or former employee or director, or (iii) renew or extend the term
of any agreement regarding compensation for any such current or former employee
or director.

         2.14. Certain Contracts

                  (a) Except as Previously Disclosed, neither FNB nor any FNB
Subsidiary is a party to, or is bound by, (i) any material contract as defined
in Item 601(b)(10) of Regulation S-K of the SEC or any other material contract
or similar arrangement whether or not made in the ordinary course of business
(other than loans or loan commitments and funding transactions in the ordinary
course of business of any FNB Subsidiary) or any agreement restricting the
nature or geographic scope of its business activities in any material respect,
(ii) any agreement, indenture or other instrument relating to the borrowing of
money by FNB or any FNB Subsidiary or the guarantee by FNB or any FNB Subsidiary
of any such obligation, other than instruments relating to transactions entered
into in the customary course, (iii) any agreement, arrangement or commitment
relating to the employment of a consultant who was formerly a director or
executive officer or the employment, election, retention in office or severance
of any present or former director or officer, or (iv) any contract, agreement or
understanding with a labor union, in each case whether written or oral.

                  (b) Except as Previously Disclosed, neither FNB nor any FNB
Subsidiary is in default under any material agreement, commitment, arrangement,
lease, insurance policy or other instrument whether entered into in the ordinary
course of business or otherwise and whether written or oral, and there has not
occurred any event that, with the lapse of time or giving of notice or both,
would constitute such a default, except for such defaults which would not,
individually or in the aggregate, have a Material Adverse Effect on FNB.

         2.15. Legal Proceedings

         Except as Previously Disclosed, there are no actions, suits or
proceedings instituted, pending or, to the knowledge of FNB or any FNB
Subsidiary, threatened (or unasserted but considered probable of assertion and
which if asserted would have at least a reasonable probability of an unfavorable
outcome) against FNB or any FNB Subsidiary or against any asset, interest or
right of FNB or any FNB Subsidiary as to which there is a reasonable probability
of an unfavorable outcome and which, if such an unfavorable outcome was
rendered, would, individually or in the aggregate, have a Material Adverse


                                     - 11 -


Effect on FNB. To the knowledge of FNB or any FNB Subsidiary, there are no
actual or threatened actions, suits or proceedings which present a claim to
restrain or prohibit the transactions contemplated herein or to impose any
material liability in connection therewith as to which there is a reasonable
probability of an unfavorable outcome and which, if such an unfavorable outcome
was rendered, would, individually or in the aggregate, have a Material Adverse
Effect on FNB. There are no actions, suits or proceedings instituted, pending
or, to the knowledge of FNB or any FNB Subsidiary, threatened (or unasserted but
considered probable of assertion and which if asserted would be reasonably
expected to have an unfavorable outcome) against any present or former director
or officer of FNB or any FNB Subsidiary, that might give rise to a claim for
indemnification and that (i) has a reasonable probability of an unfavorable
outcome and (ii) in the event of an unfavorable outcome, would, individually or
in the aggregate, have a Material Adverse Effect on FNB.

         2.16. Compliance with Laws

         Except as Previously Disclosed, FNB and each FNB Subsidiary is in
compliance in all material respects with all statutes and regulations applicable
to the conduct of its business, and neither FNB nor any FNB Subsidiary has
received notification from any agency or department of federal, state or local
government (i) asserting a material violation of any such statute or regulation,
(ii) threatening to revoke any license, franchise, permit or government
authorization or (iii) restricting or in any way limiting its operations, except
for such noncompliance, violations, revocations and restrictions which would
not, individually or in the aggregate, have a Material Adverse Effect on FNB.
Neither FNB nor any FNB Subsidiary is subject to any regulatory or supervisory
cease and desist order, agreement, directive, memorandum of understanding or
commitment which could be reasonably anticipated to have a Material Adverse
Effect on FNB, and none of them has received any communication requesting that
they enter into any of the foregoing.

         2.17. Labor Matters

         With respect to their employees, neither FNB nor any FNB Subsidiary is
a party to any labor agreement with any labor organization, group or association
and has not engaged in any unfair labor practice. Since January 1, 1998 and
prior to the date hereof, FNB and the FNB Subsidiaries have not experienced any
attempt by organized labor or its representatives to make FNB or any FNB
Subsidiary conform to demands of organized labor relating to their employees or
to enter into a binding agreement with organized labor that would cover the
employees of FNB or any FNB Subsidiary. There is no unfair labor practice charge
or other complaint by any employee or former employee of FNB or any FNB
Subsidiary against any of them pending before any governmental agency arising
out of FNB's or such FNB Subsidiary's activities, which charge or complaint (i)
has a reasonable probability of an unfavorable outcome and (ii) in the event of
an unfavorable outcome would, individually or in the aggregate, have a Material
Adverse Effect on FNB; there is no labor strike or labor disturbance pending or
threatened against any of them; and neither FNB nor any FNB Subsidiary has
experienced a work stoppage or other labor difficulty since January 1, 1998.



                                     - 12 -


         2.18. Brokers and Finders

         Neither FNB nor any FNB Subsidiary, nor any of their respective
officers, directors or employees, has employed any broker, finder or financial
advisor or incurred any liability for any fees or commissions in connection with
the transactions contemplated herein or the Plan of Merger, except for FNB's
retention of Sandler O'Neill & Partners, L.P. ("Sandler O'Neill") to perform
certain financial advisory services as Previously Disclosed. Prior to the
execution and delivery of this Agreement, Sandler O'Neill has delivered to the
Board of Directors of FNB an opinion that the Merger is fair from a financial
point of view to the shareholders of FNB.

         2.19. Insurance

         FNB and the FNB Subsidiaries each currently maintains insurance in
amounts considered by FNB and any FNB Subsidiary as applicable, to be reasonably
necessary for their operations. Neither FNB nor any FNB Subsidiary has received
any notice of a material premium increase or cancellation with respect to any of
its insurance policies or bonds, and within the last three years, neither FNB
nor any FNB Subsidiary has been refused any insurance coverage sought or applied
for, and FNB has no reason to believe that existing insurance coverage cannot be
renewed as and when the same shall expire, upon terms and conditions as
favorable as those presently in effect, other than possible increases in
premiums or unavailability in coverage that have not resulted from any
extraordinary loss experience of FNB or any FNB Subsidiary. Schedule 2.19 hereto
sets forth all currently outstanding claims against FNB or any FNB Subsidiary
under any insurance policy. The deposits of FNB Bank are insured by the FDIC in
accordance with the FDIA, and FNB Bank has paid all assessments and filed all
reports required by the FDIA.

         2.20. Environmental Liability

         Neither FNB nor any FNB Subsidiary has received any written notice of
any legal, administrative, arbitral or other proceeding, claim or action and, to
the knowledge of FNB and the FNB Subsidiaries, there is no governmental
investigation of any nature ongoing, in each case that could reasonably be
expected to result in the imposition, on FNB or any FNB Subsidiary of any
liability arising under any local, state or federal environmental statute,
regulation or ordinance including, without limitation, the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended,
which liability would have a Material Adverse Effect on FNB; except as
Previously Disclosed, there are no facts or circumstances which could reasonably
be expected to form the basis for any such proceeding, claim, action or
governmental investigation that would impose any such liability; and neither FNB
nor any FNB Subsidiary is subject to any agreement, order, judgment, decree or
memorandum by or with any court, governmental authority, regulatory agency or
third party imposing any such liability.

         2.21. Administration of Trust Accounts

         Each FNB Subsidiary has properly administered all common trust funds
and collective investment funds and all accounts for which it acts as a
fiduciary or agent, including but not limited to accounts for which it serves as
a trustee, agent, custodian, personal representative, guardian, conservator or
investment advisor, in accordance with the terms of the governing documents and
applicable state and federal law and regulation and common law, except where the
failure to do so would not, individually or in the aggregate, have a Material


                                     - 13 -


Adverse Effect on FNB. Neither FNB, any FNB Subsidiary, nor any director,
officer or employee of FNB or any FNB Subsidiary acting on behalf of FNB or an
FNB Subsidiary, has committed any breach of trust with respect to any such
common trust fund or collective investment fund or fiduciary or agency account,
and the accountings for each such common trust fund or collective investment
fund or fiduciary or agency account are true and correct in all material
respects and accurately reflect the assets of such common trust fund or
collective investment fund or fiduciary or agency account, except for such
breaches and failures to be true, correct and accurate which would not,
individually or in the aggregate, have a Material Adverse Effect on FNB.

         2.22. Intellectual Property

         Except as Previously Disclosed, FNB or an FNB Subsidiary owns the
entire right, title and interest in and to, or has valid licenses with respect
to, all of the Intellectual Property necessary in all material respects to
conduct the business and operations of FNB and the FNB Subsidiaries as presently
conducted, except where the failure to do so would not, individually or in the
aggregate, have a Material Adverse Effect on FNB. None of such Intellectual
Property is subject to any outstanding order, decree, judgment, stipulation,
settlement, lien, charge, encumbrance or attachment, which order, decree,
judgment, stipulation, settlement, lien, charge, encumbrance or attachment would
have a Material Adverse Effect on FNB. Except as Previously Disclosed, upon
consummation of the transactions contemplated by this Agreement M&T and the M&T
Subsidiaries will be entitled to continue to use all such Intellectual Property
without the payment of any fees, licenses or other payments (other than ongoing
payments required under license agreements for software used by FNB or the FNB
Subsidiaries in Previously Disclosed amounts consistent with past practice).

         2.23. Risk Management Instruments

         All interest rate swaps, caps, floors, option agreements, futures and
forward contracts and other similar risk management arrangements to which FNB or
a FNB Subsidiary is a party, whether entered into for FNB's own account, or for
the account of one or more of the FNB Subsidiaries or their customers (all of
which have been Previously Disclosed), were entered into (i) in accordance with
prudent business practices and all applicable laws, rules, regulations and
regulatory policies and (ii) with counterparties believed to be financially
responsible at the time; and each of them constitutes the valid and legally
binding obligation of FNB or one of the FNB Subsidiaries, enforceable in
accordance with its terms (except as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer and
similar laws of general equity principles), and neither FNB nor any FNB
Subsidiary nor to FNB's knowledge, any other party thereto, is in breach of any
of its obligations under any such agreement or arrangement. FNB has Previously
Disclosed all of such agreements and arrangements that are in effect as of the
date of this Agreement.



                                     - 14 -



         2.24. Repurchase Agreements

         With respect to all agreements pursuant to which FNB or any FNB
Subsidiary has purchased securities subject to an agreement to resell, if any,
FNB or such FNB Subsidiary, as the case may be, has a valid, perfected first
lien or security interest in or evidence of ownership in book entry form of the
government securities or other collateral securing the repurchase agreements,
and the value of such collateral equals or exceeds the amount of the debt
secured thereby.

         2.25. Certain Information

         When the Registration Statement or any post-effective amendment thereto
shall become effective, and at all times subsequent to such effectiveness up to
and including the time of the FNB shareholders' meeting to vote upon the Merger,
such Registration Statement and all amendments or supplements thereto, with
respect to all information set forth therein furnished by FNB relating to FNB
and the FNB Subsidiaries, (i) shall comply in all material respects with the
applicable provisions of the Securities Laws, and (ii) shall not contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements contained therein not
misleading.All information concerning FNB and its directors, officers,
shareholders and any Subsidiaries included (or submitted for inclusion) in any
application and furnished by it pursuant to Section 4.3 of this Agreement shall
be true, correct and complete in all material respects.

         2.26. Year 2000

         The computer software operated by FNB and any FNB Subsidiary which is
material to the conduct of the business of FNB and any FNB Subsidiary is capable
of providing or is being adapted to provide uninterrupted millennium
functionality to record, store, process and present calendar dates falling on or
after January 1, 2000 in substantially the same manner and with the same
functionality as such software records, stores, processes and presents such
calendar dates falling on or before December 31, 1999, and such software and FNB
and any FNB Subsidiary are otherwise in compliance with all relevant Regulatory
Authority guidance and requirements relating to the Year 2000 computer issues
including the statements of the Federal Financial Institutions Examination
Council, dated May 5, 1997, entitled "Year 2000 Project Management Awareness,"
and December 1997, entitled "Safety and Soundness Guidelines Concerning the Year
2000 Business Risk." The costs of the adaptations referred to in this clause
will not have a Material Adverse Effect on FNB.

         2.27. Tax Treatment

         As of the date of this Agreement, FNB knows of no reason relating to it
or any of the FNB Subsidiaries which would reasonably cause it to believe that
the Merger will not qualify as tax free reorganization under Section 368(a) of
the Code.


                                     - 15 -



                                   ARTICLE 3.
                        REPRESENTATIONS AND WARRANTIES OF
                               M&T AND MERGER SUB

         M&T and Merger Sub hereby jointly and severally represent and warrant
to FNB as follows:

         3.1. Capital Structure of M&T

         The authorized capital stock of M&T consists at November 30, 1998 of
(i) 1,000,000 shares of preferred stock, par value $1.00 per share ("M&T
Preferred Stock"), none of which were issued and outstanding and (ii) 15,000,000
shares of common stock, par value $5.00 per share ("M&T Common Stock"), of
which, as of the date hereof, 7,747,788 shares were issued and outstanding and
353,751 shares were held in treasury. All outstanding shares of M&T capital
stock have been duly authorized and validly issued and are fully paid and
nonassessable. None of the shares of M&T's capital stock has been issued in
violation of the preemptive rights of any person. The shares of M&T Common Stock
to be issued in connection with the Merger have been duly authorized and, when
issued in accordance with the terms of this Reorganization Agreement and the
Plan of Merger, will be validly issued, fully paid, nonassessable and free and
clear of any preemptive rights.

         3.2. Organization, Standing and Authority of M&T

         M&T is a duly organized corporation, validly existing and in good
standing under the laws of New York, with full corporate power and authority to
carry on its business as now conducted and is duly licensed or qualified to do
business in the states of the United States and foreign jurisdictions where its
ownership or leasing of property or the conduct of its business requires such
qualification, except where the failure to be so licensed or qualified would not
have a Material Adverse Effect on M&T. M&T is registered as a bank holding
company under the Bank Holding Company Act.

         3.3. Ownership of M&T Subsidiaries; Capital Structure of M&T
              Subsidiaries

         M&T has no Subsidiary other than those disclosed in its Annual Report
on Form 10-K for the year ended December 31, 1997, Merger Sub or any Subsidiary
that is not a significant subsidiary under the SEC's Regulation S-X. Except as
Previously Disclosed, the outstanding shares of capital stock of the M&T
Subsidiaries have been duly authorized and validly issued and are fully paid and
(except as provided in 12 U.S.C. ss. 55 or Section 114 of the New York Banking
Law) nonassessable and all such shares are directly or indirectly owned by M&T
free and clear of all liens, claims and encumbrances. No M&T Subsidiary has or
is bound by any Rights which are authorized, issued or outstanding with respect
to the capital stock of any M&T Subsidiary and, except as Previously Disclosed,
there are no agreements, understandings or commitments relating to the right of
M&T to vote or to dispose of said shares. None of the shares of capital stock of
any M&T Subsidiary has been issued in violation of the preemptive rights of any
person.

         3.4. Organization, Standing and Authority of M&T Subsidiaries

         Each M&T Subsidiary is a duly organized corporation or banking
corporation, validly existing and in good standing under applicable laws. Each
M&T Subsidiary (i) has full power and authority to carry on its business as now
conducted, and (ii) is duly licensed or qualified to do business in the states


                                     - 16 -



of the United States and foreign jurisdictions where its ownership or leasing of
property or the conduct of its business requires such licensing or qualification
and where failure to be licensed or qualified would have a Material Adverse
Effect on M&T. Each M&T Subsidiary has all federal, state, local and foreign
governmental authorizations necessary for it to own or lease its properties and
assets and to carry on its business as it is now being conducted, except where
the failure to be so authorized would not have a Material Adverse Effect on M&T.

         3.5. Authorized and Effective Agreement

                  (a) Each of M&T and Merger Sub has all requisite corporate
power and authority to enter into and perform all of its obligations under this
Reorganization Agreement and the Plan of Merger. The execution and delivery of
this Reorganization Agreement and the Plan of Merger and the consummation of the
transactions contemplated hereby and thereby have been duly and validly
authorized by all necessary corporate action in respect thereof on the part of
M&T and Merger Sub.

                  (b) Assuming the accuracy of the representation contained in
Section 2.5(b) hereof, this Reorganization Agreement and the Plan of Merger
constitute legal, valid and binding obligations of each of M&T and Merger Sub,
in each case enforceable against it in accordance with their respective terms
subject, as to enforceability, to bankruptcy, insolvency and other laws of
general applicability relating to or affecting creditors' rights and to general
equity principles.

                  (c) Except as Previously Disclosed, neither the execution and
delivery of this Reorganization Agreement or the Plan of Merger, nor
consummation of the transactions contemplated hereby or thereby, nor compliance
by M&T or Merger Sub with any of the provisions hereof or thereof shall (i)
conflict with or result in a breach of any provision of the articles or
certificate of incorporation or association, charter or bylaws of M&T or any M&T
Subsidiary, (ii) assuming the consents and approvals contemplated by Section 4.3
hereof and the consents and approvals which are Previously Disclosed are duly
obtained, constitute or result in a breach of any term, condition or provision
of, or constitute a default under, or give rise to any right of termination,
cancellation or acceleration with respect to, or result in the creation of any
lien, charge or encumbrance upon any property or asset of M&T or any M&T
Subsidiary pursuant to, any note, bond, mortgage, indenture, license, agreement
or other instrument or obligation, or (iii) assuming the consents and approvals
contemplated by Section 4.3 hereof and the consents and approvals which are
Previously Disclosed are duly obtained, violate any order, writ, injunction,
decree, statute, rule or regulation applicable to M&T or any M&T Subsidiary,
except (in the case of clauses (ii) and (iii) above) for such violations,
rights, conflicts, breaches, creations or defaults which, either individually or
in the aggregate, will not have a Material Adverse Effect on M&T.

                  (d) Except for approvals specified in Section 4.3 hereof,
except as Previously Disclosed and except as expressly referred to in this
Reorganization Agreement, no consent, approval or authorization of, or
declaration, notice, filing or registration with, any governmental or regulatory
authority, or any other person, is required to be made or obtained by M&T or
Merger Sub on or prior to the Closing Date in connection with the execution,


                                     - 17 -



delivery and performance of this Agreement and the Plan of Merger or the
consummation of the transactions contemplated hereby or thereby. Neither M&T nor
any of the M&T Subsidiaries is aware of any reason why the conditions set forth
in Section 5.1(b) of this Agreement will not be satisfied without undue delay
and without the imposition of any condition or requirement of the type referred
to in the provisions thereof.

         3.6. SEC Documents; Regulatory Filings

         M&T has filed all SEC Documents required by the Securities Laws and
such SEC Documents complied, as of their respective dates, in all material
respects with the Securities Laws. M&T and each of the M&T Subsidiaries has
filed all reports required by statute or regulation to be filed with any federal
or state bank regulatory agency, except where the failure to so file would not
have a Material Adverse Effect on M&T, and such reports were prepared in
accordance with the applicable statutes, regulations and instructions in
existence as of the date of filing of such reports in all material respects.

         3.7. Financial Statements; Books and Records; Minute Books

         The M&T Financial Statements filed by M&T in SEC documents prior to the
date of this Agreement fairly present, and the M&T Financial Statements files by
M&T in SEC Documents after the date of the Agreement will fairly present the
consolidated financial position of M&T and its consolidated Subsidiaries as of
the dates indicated and the consolidated results of operations, changes in
shareholders' equity and cash flows of M&T and its consolidated Subsidiaries for
the periods then ended and each such financial statement has been or will be, as
the case may be, prepared in conformity with generally accepted accounting
principles applicable to financial institutions applied on a consistent basis
except as disclosed therein and except in the case of unaudited statements, as
permitted by Form 10-Q. . The books and records of M&T and each M&T Subsidiary
fairly reflect in all material respects the transactions to which it is a party
or by which its properties are subject or bound. Such books and records have
been properly kept and maintained and are in compliance in all material respects
with all applicable legal and accounting requirements. The minute books of M&T
and the M&T Subsidiaries contain records which are accurate in all material
respects of all corporate actions of its shareholders and Board of Directors
(including committees of its Board of Directors).

         3.8. Material Adverse Change

         M&T has not, on a consolidated basis, suffered any change in its
financial condition, results of operations or business since December 31, 1997
which individually or in the aggregate with any other such changes would
constitute a Material Adverse Effect with respect to M&T.

         3.9. Absence of Undisclosed Liabilities

         Neither M&T nor any M&T Subsidiary has any liability (contingent or
otherwise), excluding contractually assumed contingencies, that is material to
M&T on a consolidated basis, or that, when combined with all similar
liabilities, would be material to M&T on a consolidated basis, except as
Previously Disclosed, as disclosed in the M&T Financial Statements filed with
the SEC prior to the date hereof and except for liabilities incurred in the
ordinary course of business subsequent to Spetember 30, 1998.


                                     - 18 -



         3.10. Employee Benefit Plans

                    Each of the M&T Plans complies in all material respects with
the requirements of applicable law, including ERISA and the Code. For purposes
of this Agreement, the term "M&T Plan" means each bonus, incentive compensation,
severance pay, medical or other insurance program, retirement plan, or other
employee benefit plan program, agreement or arrangement sponsored, maintained or
contributed to by M&T or any trade or business, whether or not incorporated,
that together with M&T or any of the M&T Subsidiaries would be deemed a "single
employer" under Section 414 of the Code (an "ERISA Affiliate") or under which
M&T or any ERISA Affiliate has any liability or obligation. No liability under
Title IV of ERISA has been incurred by M&T or any ERISA Affiliate that has not
been satisfied in full, and no condition exists that presents a material risk to
M&T or any ERISA Affiliate of incurring any such liability. Full payment has
been made, or will be made in accordance with Section 404(a)(6) of the Code of
all amounts that M&T or any ERISA Affiliate is required to pay under Section 412
of the Code or under the terms of the M&T Plans, and no accumulated funding
deficiency (within the meaning of Section 412 of the Code) exists with respect
to any M&T Plan. There has been no material adverse change in the funded status
of any M&T Plan that is subject to Title IV of ERISA since the date of the
information relating to such funded status contained in the most recent M&T Form
10-K filed with the SEC.

         3.11. Legal Proceedings

         Except as Previously Disclosed, there are no actions, suits or
proceedings instituted, pending or, to the knowledge of M&T and Merger Sub,
threatened (or unasserted but considered probable of assertion and which if
asserted would have at least a reasonable probability of an unfavorable outcome)
against M&T, Merger Sub or any M&T Subsidiary or against any asset, interest or
right of M&T or any M&T Subsidiary as to which there is a reasonable probability
of an unfavorable outcome and which, if such an unfavorable outcome was
rendered, would, individually or in the aggregate, have a Material Adverse
Effect on M&T. There are no actual or threatened actions, suits or proceedings
which present a claim to restrain or prohibit the transactions contemplated
herein or to impose any material liability in connection therewith as to which
there is a reasonable probability of an unfavorable outcome and which, if such
an unfavorable outcome was rendered, would, individually or in the aggregate,
have a Material Adverse Effect on M&T.

         3.12. Compliance with Laws

         Except as Previously Disclosed, each of M&T and the M&T Subsidiaries is
in compliance in all material respects with all statutes and regulations
applicable to the conduct of its business, and none of them has received
notification from any agency or department of federal, state or local government
(i) asserting a material violation of any such statute or regulation, (ii)
threatening to revoke any license, franchise, permit or government authorization
or (iii) restricting or in any way limiting its operations, except for such


                                     - 19 -



noncompliance, violations, revocations and restrictions which would not,
individually or in the aggregate, have a Material Adverse Effect on M&T. None of
M&T or any M&T Subsidiary is subject to any regulatory or supervisory cease and
desist order, agreement, directive, memorandum of understanding or commitment
which could be reasonably anticipated to have a Material Adverse Effect on M&T,
and none of them has received any communication requesting that they enter into
any of the foregoing.

         3.13. Tax Matters

                     (a) M&T and each M&T Subsidiary have timely filed federal
income tax returns for each year through December 31, 1997 and have timely
filed, or caused to be filed, all other federal, state, local and foreign tax
returns (including, without limitation, estimated tax returns, returns required
under Sections 1441-1446 and 6031-6060 of the Code and the regulations
thereunder and any comparable state, foreign and local laws, any other
information returns, withholding tax returns, FICA and FUTA returns and back up
withholding returns required under Section 3406 of the Code and any comparable
state, foreign and local laws) required to be filed with respect to M&T or any
M&T Subsidiary, except where the failure to file timely such federal income and
other tax returns would not, in the aggregate, have a Material Adverse Effect on
M&T. All taxes due in respect of the periods covered by such tax returns have
been paid or adequate reserves have been established for the payment of such
taxes, except where any such failure to pay or establish adequate reserves would
not, in the aggregate, have a Material Adverse Effect on M&T and, as of the
Closing Date, all taxes due in respect of any subsequent periods (or portions
thereof) ending on or prior to the Closing Date will have been paid or adequate
reserves will have been established for the payment thereof, except where any
such failure to pay or establish adequate reserves would not, in the aggregate,
have a Material Adverse Effect on M&T. Except as Previously Disclosed, no
material (i) audit examination, (ii) deficiency, or (iii) refund litigation with
respect to such returns or periods has been proposed or asserted or is pending.
Neither M&T nor any M&T Subsidiary will have any material liability for any such
taxes in excess of the amounts so paid or reserves or accruals so established.

                     (b) All federal, state and local (and, if applicable,
foreign) tax returns filed by M&T and each M&T Subsidiary are complete and
accurate in all material respects. Neither M&T nor any M&T Subsidiary is
delinquent in the payment of any material tax, assessment or governmental
charge, and, except as Previously Disclosed, none of them has requested any
extension of time within which to file any tax returns in respect of any fiscal
year or portion thereof which have not since been filed. Except as Previously
Disclosed, no material deficiencies for any tax, assessment or governmental
charge have been proposed, asserted or assessed (tentatively or otherwise)
against M&T or any M&T Subsidiary which have not been settled, paid or accrued.

                     (c) Neither M&T nor any M&T Subsidiary is required to
include in income any adjustment in any taxable period ending after the date
hereof pursuant to Section 481(a) of the Code other than any adjustment for
which it already has made an accrual.

                     (d) For purposes of this Section 3.13, references to M&T
and any M&T Subsidiary shall include predecessors thereof.


                                     - 20 -



         3.14. Brokers and Finders

         Neither M&T nor any M&T Subsidiary, nor any of their respective
officers, directors or employees, has employed any broker, finder or financial
advisor or incurred any liability for any fees or commissions in connection with
the transactions contemplated herein or the Plan of Merger, except for legal and
accounting fees.

         3.15. Insurance

         M&T and the M&T Subsidiaries each currently maintains insurance in
amounts considered by M&T and any M&T Subsidiary as applicable, to be reasonably
necessary for their operations. Neither M&T nor any M&T Subsidiary has received
any notice of a material premium increase or cancellation with respect to any of
its insurance policies or bonds, and within the last three years, neither M&T
nor any M&T Subsidiary has been refused any insurance coverage sought or applied
for, and M&T has no reason to believe that existing insurance coverage cannot be
renewed as and when the same shall expire, upon terms and conditions as
favorable as those presently in effect, other than possible increases in
premiums or unavailability in coverage that have not resulted from any
extraordinary loss experience of M&T or any M&T Subsidiary.

         3.16. Environmental Liability

         Neither M&T nor any M&T Subsidiary has received any written notice of
any legal, administrative, arbitral or other proceeding, claim or action and, to
the knowledge of M&T and the M&T Subsidiaries, there is no governmental
investigation of any nature ongoing, in each case that could reasonably be
expected to result in the imposition, on M&T or any M&T Subsidiary of any
liability arising under any local, state or federal environmental statute,
regulation or ordinance including, without limitation, the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended,
which liability would have a Material Adverse Effect on M&T; except as
Previously Disclosed, there are no facts or circumstances which could reasonably
be expected to form the basis for any such proceeding, claim, action or
governmental investigation that would impose any such liability; and neither M&T
nor any M&T Subsidiary is subject to any agreement, order, judgment, decree or
memorandum by or with any court, governmental authority, regulatory agency or
third party imposing any such liability.

         3.17. Certain Information

         When the Registration Statement or any post-effective amendment thereto
shall become effective, and at all times subsequent to such effectiveness up to
and including the time of the FNB shareholders' meeting to vote upon the Merger,
such Registration Statement and all amendments or supplements thereto, with
respect to all information set forth therein furnished by M&T relating to M&T
and the M&T Subsidiaries, (i) shall comply in all material respects with the
applicable provisions of the Securities Laws, and (ii) shall not contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements contained therein not
misleading. All information concerning M&T and its directors, officers,
shareholders and any Subsidiaries included (or submitted for inclusion) in any
application and furnished by it pursuant to Section 4.3 of this Agreement shall
be true, correct and complete in all material respects.


                                     - 21 -



         3.18. Year 2000

         The computer software operated by M&T or any M&T Subsidiary which is
material to the conduct of M&T's or any M&T Subsidiary's business is capable of
providing or is being adapted to provide uninterrupted millennium functionality
to record, store, process and present calendar dates falling on or after January
1, 2000 in substantially the same manner and with the same functionality as such
software records, stores, processes and presents such calendar dates falling on
or before December 31, 1999, and such software and M&T or any M&T Subsidiary is
otherwise in compliance with all relevant Regulatory Authority guidance and
requirements relating to the Year 2000 computer issues including the statements
of the Federal Financial Institutions Examination Council, dated May 5, 1997,
entitled "Year 2000 Project Management Awareness," and December 1997, entitled
"Safety and Soundness Guidelines Concerning the Year 2000 Business Risk." The
costs of the adaptations referred to in this clause will not have a Material
Adverse Effect on M&T.

         3.19. Tax Treatment

         As of the date of this Agreement, M&T knows of no reason relating to it
or any of the M&T Subsidiaries which would reasonably cause it to believe that
the Merger will not qualify as a tax-free reorganization under Section 368(a) of
the Code.

         3.20. Merger Consideration

         M&T has unissued shares of Common Stock and shares of Common Stock held
in its treasury that are not reserved for any other purpose sufficient to
provide the Stock Consideration and has available to it sources of funds
sufficient to provide the Cash Consideration.

                                   ARTICLE 4.
                                   COVENANTS

         4.1. Shareholders' Meeting

         FNB shall submit this Reorganization Agreement and the Plan of Merger
to its shareholders for approval at a special meeting to be held as soon as
practicable. Subject to the fiduciary duties of the board of directors of FNB as
determined after consultation with counsel, the board of directors of FNB shall
recommend that the shareholders vote in favor of such approval.

         4.2. Proxy Statement; Registration Statement

         As promptly as practicable after the date hereof, M&T and FNB shall
cooperate in the preparation of the Proxy Statement to be mailed to the
shareholders of FNB in connection with this Agreement and the transactions
contemplated hereby and to be filed by M&T as part of the Registration
Statement. M&T will advise FNB, promptly after it receives notice thereof, of


                                     - 22 -



the time when the Registration Statement or any post-effective amendment thereto
has become effective or any supplement or amendment has been filed, of the
issuance of any stop order, of the suspension of qualification of the M&T Common
Stock issuable in connection with the Merger for offering or sale in any
jurisdiction, or the initiation or threat of any proceeding for any such
purpose, or of any request by the SEC for the amendment or supplement of the
Registration Statement or for additional information. M&T shall take all actions
necessary to register or qualify the shares of M&T Common Stock to be issued in
the Merger pursuant to all applicable state "blue sky" or securities laws and
shall maintain such registrations or qualifications in effect for all purposes
hereof. M&T shall apply for approval to list the shares of M&T Common Stock to
be issued in the Merger on the NYSE, subject to official notice of issuance,
prior to the Effective Date.

         4.3. Applications

         As promptly as practicable after the date hereof, and after a
reasonable opportunity for review by counsel to FNB, M&T shall submit any
requisite applications for prior approval of, and notices with respect to, the
transactions contemplated herein, in the Plan of Merger and in the Bank Merger
Agreement (i) to the Federal Reserve Board pursuant to Section 3 of the Bank
Holding Company Act and the Bank Merger Act, (ii) to the OCC pursuant to 12
C.F.R. ss. 5.33(g)(3), and (iii) to the New York Banking Board pursuant to
Section 142 of the New York Banking Law, and the regulations promulgated
thereunder, and each of the parties hereto shall, and they shall cause their
respective subsidiaries to, submit any applications, notices or other filings to
any other state or federal government agency, department or body the approval of
which is required for consummation of the Merger and the Bank Merger.

         4.4. Best Efforts

                  (a) Subject to the terms and conditions of this Agreement,
M&T, Merger Sub, and FNB shall each use its reasonable best efforts in good
faith, and each of them shall cause its Subsidiaries to use their reasonable
best efforts in good faith, to (i) furnish such information as may be required
in connection with the preparation of the documents referred to in Sections 4.2
and 4.3 above, and (ii) take or cause to be taken all action necessary or
desirable on its part so as to permit consummation of the Merger at the earliest
possible date, including, without limitation, (1) obtaining the consent or
approval of each individual, partnership, corporation, association or other
business or professional entity whose consent or approval is required for
consummation of the transactions contemplated hereby, provided that neither FNB
nor any FNB Subsidiary shall agree to make any payments or modifications to
agreements in connection therewith without the prior written consent of M&T,
which consent shall not be unreasonably withheld and (2) requesting the delivery
of appropriate opinions, consents and letters from its counsel and independent
auditors. Subject to the terms and conditions of this Agreement, no party hereto
shall take or fail to take, or cause or permit its Subsidiaries to take or fail
to take, or to the best of its ability permit to be taken or omitted to be taken
by any third persons, any action that would substantially impair the prospects
of completing the Merger pursuant to this Reorganization Agreement and the Plan
of Merger, that would materially delay such completion, or that would adversely
affect the qualification of the Merger as a reorganization within the meaning of
Section 368(a) of the Code; provided that nothing herein contained shall


                                     - 23 -



preclude M&T from exercising its rights under the Option Agreement. In the event
that either party has taken any action, whether before, on or after the date
hereof, that would adversely affect such qualification, each party shall take
such action as the other party may reasonably request to cure such effect to the
extent curable without a Material Adverse Effect on either of the parties.

                  (b) FNB shall give prompt notice to M&T, and M&T shall give
prompt notice to FNB, of (i) the occurrence, or failure to occur, of any event
which occurrence or failure would be likely to cause any representation or
warranty contained in this Agreement to be untrue or inaccurate in any material
respect at any time from the date hereof to the Closing Date and (ii) any
material failure of FNB or M&T, as the case may be, to comply with or satisfy
any covenant, condition or agreement to be complied with or satisfied by it
hereunder, and each party shall use all reasonable efforts to remedy such
failure.

                  (c) From the date of this Agreement through the Effective
Date, FNB shall, and shall cause the FNB Subsidiaries to, provide such
assistance to M&T as shall be reasonably necessary to assist M&T in converting
and transferring as soon as practicable after the Effective Date all information
concerning the loans, deposits and other assets and liabilities of FNB and the
FNB Subsidiaries into M&T's own data processing system. After execution of this
Agreement, FNB shall provide M&T with computer file instructions with respect to
the information in its data processing system regarding the assets and
liabilities of FNB and the FNB Subsidiaries, together with operational
procedures designed to implement the transfer of such information to M&T. After
execution of this Agreement, FNB and M&T shall each designate an individual to
serve as liaison concerning the transfer of data processing information and
other similar operational matters and to consult as to whether and when FNB will
proceed with its pending data processing conversion.

                  (d) Each party shall provide and shall request its auditors to
provide the other party with such historical financial information regarding it
(and related audit reports and consents) as the other party may reasonably
request for securities disclosure purposes.

         4.5. Investigation and Confidentiality

         FNB and M&T each will keep the other advised of all material
developments relevant to its business and to consummation of the transactions
contemplated herein and in the Plan of Merger. M&T and FNB each may make or
cause to be made such investigation of the financial and legal condition of the
other as such party reasonably deems necessary or advisable in connection with
the transactions contemplated herein and in the Plan of Merger, provided,
however, that such investigation shall be reasonably related to such
transactions and shall not interfere unnecessarily with normal operations. M&T
and FNB agree to furnish the other and the other's advisors with such financial
data and other information with respect to its business and properties as such
other party shall from time to time reasonably request. No investigation
pursuant to this Section 4.5 shall affect or be deemed to modify any
representation or warranty made by, or the conditions to the obligations to
consummate the Merger of, any party hereto. Each party hereto shall hold all
information furnished by the other party or any of such party's Subsidiaries or
representatives pursuant to this Section 4.5 in confidence to the extent
required by, and in accordance with, the provisions of the confidentiality
agreements, dated November 23, 1998 and December 5, 1998 between FNB and M&T
(the "Confidentiality Agreements").


                                     - 24 -



         4.6. Press Releases

         FNB and M&T shall agree with each other as to the form and substance of
any press release related to this Reorganization Agreement and the Plan of
Merger or the transactions contemplated hereby or thereby, and shall consult
each other as to the form and substance of other public disclosures related
thereto, provided, however, that nothing contained herein shall prohibit any
party, following notification to the other parties, from making any disclosure
which is required by applicable law or NYSE or NASDAQ rules.

         4.7. Actions Pending the Merger

                  (a) Prior to the Closing Date, and except as otherwise
provided for by this Reorganization Agreement, the Plan of Merger, the Option
Agreement, or consented to or approved by M&T, FNB shall, and shall cause each
of the FNB Subsidiaries to, use its reasonable best efforts to preserve its
properties, business and relationships with customers, employees and other
persons.

                  (b) FNB shall not, and shall not permit any of the FNB
Subsidiaries to, except with the prior written consent of M&T and except as
Previously Disclosed or expressly contemplated or permitted by this Agreement,
the Plan of Merger, or the Option Agreement:

                         (1) carry on its business other than in the usual,
regular and ordinary course in substantially the same manner as heretofore
conducted;

                         (2) in the case of FNB only, declare, set aside, make
or pay any dividend or other distribution in respect of its capital stock other
than its regular quarterly cash dividends on FNB Common Stock in amounts not in
excess of $.08 per share;

                         (3) issue any shares of its capital stock or permit any
treasury shares to become outstanding other than pursuant to the Option
Agreement or Rights outstanding at the date hereof;

                         (4) incur any additional debt obligation or other
obligation for borrowed money other than in the ordinary course of business
consistent with past practice;

                         (5) issue, grant or authorize any Rights or effect any
recapitalization, reclassification, stock dividend, stock split or like change
in capitalization, or redeem, repurchase or otherwise acquire any shares of its
capital stock except for Trust Account Shares and DPC Shares, and except for
shares to be used to fulfill FNB's obligations under the FNB Employee Stock
Purchase Plan and the FNB 401(k) Stock Purchase Plan; provided however, that in
order to fulfill such obligations, FNB shall acquire the necessary shares of FNB
Common Stock solely through open market purchases or the use of treasury shares
previously acquired by FNB in open market purchases;


                                     - 25 -



                         (6) amend its articles or certificate of incorporation
or association or bylaws; impose, or suffer the imposition, on any share of
stock of any FNB Subsidiary held by FNB of any lien, charge or encumbrance, or
permit any such lien, charge or encumbrance to exist except, in each case, for
liens, charges and encumbrances which have been Previously Disclosed;

                         (7) merge with any other corporation, savings
association or bank or permit any other corporation, savings association or bank
to merge into it or consolidate with any other corporation, savings association
or bank; acquire control over any other firm, bank, corporation, savings
association or organization or create any Subsidiary;

                         (8) except in the ordinary course of business, waive or
release any material right or cancel or compromise any material debt or claim;

                         (9) liquidate or sell or dispose of any material assets
or acquire any material assets; except as Previously Disclosed, make any capital
expenditure in excess of $25,000 in any instance or $100,000 in the aggregate;
or, except as Previously Disclosed, establish new branches or other similar
facilities, close existing branches or similar facilities or enter into or
modify any leases or other contracts relating thereto;

                         (10) increase the rate of compensation of, pay or agree
to pay any bonus to, or provide any other employee benefit or incentive to, any
of its directors, officers or employees except in a manner consistent with past
practice;

                         (11) change its lending, investment, asset/liability
management or other material banking policies in any material respect except as
may be required by changes in applicable law;

                         (12) change its methods of accounting in effect at
December 31, 1997, except as required by changes in generally accepted
accounting principles concurred in by its independent certified public
accountants, or change any of its methods of reporting income and deductions for
federal income tax purposes from those employed in the preparation of its
federal income tax returns for the year ended December 31, 1997, except as
required by law;

                         (13) authorize or permit any of its officers,
directors, employees or agents to directly or indirectly solicit, initiate or
encourage any inquiries relating to, or the making of any proposal which
constitutes, a "takeover proposal" (as defined below), or, except to the extent
legally required for the discharge of the fiduciary duties of its Board of
Directors, recommend or endorse any takeover proposal, or participate in any
discussions or negotiations, or provide third parties with any nonpublic
information, relating to any such inquiry or proposal or otherwise facilitate
any effort or attempt to make or implement a takeover proposal; provided,
however, that FNB may communicate information about any such takeover proposal
to its stockholders if, in the judgment of FNB's Board of Directors, after
consultation with outside counsel, such communication is necessary in order to
comply with its fiduciary duties to FNB's shareholders required under applicable
law. FNB will take all actions necessary or advisable to inform the appropriate
individuals or entities referred to in the first sentence hereof of the
obligations undertaken herein. FNB will notify M&T immediately if any such
inquiries or takeover proposals are received by, any such information is


                                     - 26 -



requested from, or any such negotiations or discussions are sought to be
initiated or continued with, FNB, and FNB will promptly inform M&T in writing of
all of the relevant details with respect to the foregoing. As used in this
Agreement, "takeover proposal" shall mean any tender or exchange offer, proposal
for a merger, consolidation or other business combination involving FNB or any
FNB Subsidiary or any proposal or offer to acquire in any manner a substantial
equity interest in, or a substantial portion of the assets of, FNB or any FNB
Subsidiary other than the transactions contemplated or permitted by this
Agreement, the Plan of Merger and the Option Agreement; or

                         (14) agree to do any of the foregoing.

         4.8. Certain Policies

         Prior to the Effective Date, FNB shall, consistent with generally
accepted accounting principles and on a basis mutually satisfactory to it and
M&T, modify and change its loan, litigation and real estate valuation policies
and practices (including loan classifications and levels of reserves) so as to
be applied on a basis that is consistent with that of M&T; provided, however,
that FNB shall not be obligated to take any such action pursuant to this Section
4.8 unless and until (i) M&T irrevocably acknowledges to FNB in writing any that
all conditions to its obligation to consummate the Merger have been satisfied
and (ii) M&T irrevocably waives in writing any and all rights that it may have
to terminate this Agreement and Plan of Merger.

         4.9. Closing; Articles of Merger

         The transactions contemplated by this Reorganization Agreement and the
Plan of Merger shall be consummated at a closing to be held at the offices of
the law firm of Arnold & Porter, 399 Park Avenue, New York, New York on the
first business day following satisfaction of the conditions to consummation of
the Merger set forth in Article 5 hereof (other than such conditions relating to
the actions to be taken at the Closing) or such later date during such month in
which such business day shall occur (or, if such business day shall occur within
10 business days prior to the end of such month, during the next following
month) as may be specified by M&T. In connection with such Closing, Merger Sub
and FNB shall execute a certificate of merger and shall cause such certificate
to be delivered to (i) the Delaware Secretary of State in accordance with
Section 251(c) of the Delaware General Corporation Law, and (ii) the New York
Secretary of State in accordance with Section 904(a) of the New York Business
Corporation Law. The Merger shall be effective at the time and on the date
specified in such certificate of merger.

         4.10. Affiliates

         FNB and M&T shall cooperate and use their best efforts to identify
those persons who may be deemed to be "affiliates" of FNB within the meaning of
Rule 145 promulgated by the Commission under the Securities Act. FNB shall use
its best efforts to cause each person so identified to deliver to M&T, no later
than 30 days prior to the Effective Date, a written Affiliate Agreement in a
form to be agreed upon by M&T and FNB.


                                     - 27 -



         4.11. FNB Employees; Directors and Management; Indemnification

                  (a) On and after the Effective Date (or as soon thereafter as
may be practicable), all persons who are employed by FNB and/or any of the FNB
Subsidiaries on such date ("FNB Employees") shall be employed upon terms and
conditions (including benefits) which in the aggregate are no less favorable
with respect to their employment by M&T and its Subsidiaries after the Effective
Date than those generally afforded to other employees of M&T Subsidiaries
holding similar positions, subject to the terms and conditions under which those
employee benefits are made available to such employees and provided that for
purposes of determining eligibility for and vesting of such employee benefits
only (and not for pension benefit accrual purposes) and, if applicable, for
purposes of satisfying any waiting periods concerning "preexisting conditions"
and the satisfaction of any "copayment" or deductible requirements, service with
FNB or a FNB Subsidiary or any predecessor thereto prior to the Effective Date
shall be treated as service with an "employer" to the same extent as if such
persons had been employees of M&T, and provided further that this Section
4.11(a) shall not be construed (i) to limit the ability of M&T and its
affiliates to terminate the employment of any employee or to review employee
benefits programs from time to time and to make such changes as they deem
appropriate or (ii) to require M&T or its affiliates to provide employees or
former employees of FNB or any of its Subsidiaries with post-retirement medical
benefits more favorable than those provided to new hires at M&T. M&T agrees to
honor, or to cause the appropriate M&T Subsidiary to honor, in accordance with
their terms all employment, severance and employee benefit plans, contracts,
agreements, arrangements, and understandings Previously Disclosed, provided,
however, that the foregoing shall not prevent M&T from amending or terminating
any such plan, contract, agreement, arrangement or understanding in accordance
with its terms. The continued coverage of the FNB Employees under the employee
benefit plans maintained by FNB and/or any FNB Subsidiary immediately prior to
the Effective Date (the "FNB Plans") during a transition period shall be deemed
to provide the FNB Employees with benefits that are no less favorable than those
offered to other employees of M&T and any M&T Subsidiary, provided that after
the Effective Date there is no material reduction (determined on an overall
basis) in the benefits provided under the FNB Plans. No provision of this
Section 4.11(a) shall create any third party beneficiary rights in any employee
or former employee of FNB (including any beneficiary or dependent thereof) in
respect of continued employment (or resumed employment) or any other matter.

                  (b) M&T agrees to honor the employee agreements, plans and
arrangements Previously Disclosed in connection with Section 4.11(b). With
respect to these employment arrangements Previously Disclosed in connection with
Section 4.11(b), the provisions of this Section 4.11(b) are intended to be for
the benefit of and shall be enforceable by, those individuals who are parties to
such agreements and their respective heirs and representatives.

                  (c) M&T's Board of Directors shall take all requisite action
to elect as directors of M&T as of the Effective Date Messrs. R. Carlos
Carballada and Michael J. Falcone and M&T shall cause M&T Bank's Board of
Directors to take all requisite action to elect Messrs. Carballada and Falcone
as directors of M&T Bank as of the Effective Date.


                                     - 28 -



                  (d) In the event of any threatened or actual claim, action,
suit, proceeding or investigation, whether civil, criminal or administrative,
including, without limitation, any such claim, action, suit, proceeding or
investigation in which any person who is now, or has been at any time prior to
the date of this Agreement, or who becomes prior to the Effective Date, a
director or officer of FNB (the "Indemnified Parties") is, or is threatened to
be, made a party based in whole or in part on, or arising in whole or in part
out of, or pertaining to (i) the fact that he is or was a director, officer or
employee of FNB, or any FNB Subsidiary or any of their respective predecessors
or (ii) this Agreement, the Plan of Merger, the Option Agreement or any of the
transactions contemplated hereby or thereby, whether in any case asserted or
arising before or after the Effective Date, the parties hereto agree to
cooperate and use their best efforts to defend against and respond thereto.
After the Effective Date, M&T shall indemnify and hold harmless, as and to the
fullest extent permitted by law, each such Indemnified Party against any losses,
claims, damages, liabilities, costs, expenses (including reasonable attorney's
fees and expenses in advance of the final disposition of any claim, suit,
proceeding or investigation to each Indemnified Party to the fullest extent
permitted by law upon receipt of any undertaking required by applicable law),
judgments, fines and amounts paid in settlement in connection with any such
threatened or actual claim, action, suit, proceeding or investigation, and in
the event of any such threatened or actual claim, action, suit, proceeding or
investigation (whether asserted or arising before or after the Effective Date),
the Indemnified Parties may retain counsel reasonably satisfactory to them after
consultation with M&T; provided, however, that (1) M&T shall have the right to
assume the defense thereof and upon such assumption M&T shall not be liable to
any Indemnified Party for any legal expenses of other counsel or any other
expenses subsequently incurred by any Indemnified Party in connection with the
defense thereof, except that if M&T elects not to assume such defense or counsel
for the Indemnified Parties reasonably advises the Indemnified Parties that
there are issues which raise conflicts of interest between M&T and the
Indemnified Parties, the Indemnified Parties may retain counsel reasonably
satisfactory to them after notification, and M&T shall pay the reasonable fees
and expenses of such counsel for the Indemnified Parties, (2) M&T shall be
obligated pursuant to this paragraph to pay for only one firm of counsel for all
Indemnified Parties, (3) M&T shall not be liable for any settlement effected
without its prior written consent (which consent shall not be unreasonably
withheld) and (4) M&T shall have no obligation hereunder to any Indemnified
Party when and if a court of competent jurisdiction shall ultimately determine,
and such determination shall have become final and nonappealable, that
indemnification of such Indemnified Party in the manner contemplated hereby is
prohibited by applicable law. Any Indemnified Party wishing to claim
Indemnification under this Section 4.11(d), upon learning of any such claim,
action, suit, proceeding or investigation, shall promptly notify M&T thereof,
provided that the failure of any Indemnified Party to so notify M&T shall not
relieve it of its obligations hereunder except (and only) to the extent that
such failure materially prejudices M&T. M&T's obligations under this Section
4.11(d) continue in full force and effect for a period of six years from the
Effective Date; provided, however, that all rights to indemnification in respect
of any claim (a "Claim") asserted or made within such period shall continue
until the final disposition of such Claim.

                  (e) M&T agrees that all rights to indemnification and all
limitations on liability existing in favor of the directors, officers and
employees of FNB and any FNB Subsidiary (the "Covered Parties") as provided in
their respective Certificates of Incorporation, Bylaws or similar governing


                                     - 29 -



documents as in effect as of the date of this Agreement with respect to matters
occurring prior to the Effective Date shall survive the Merger and shall
continue in full force and effect, and shall be honored by such entities or
their respective successors as if they were the indemnifying party thereunder,
without any amendment thereto, for a period of six years from the Effective
Date; provided, however, that all rights to indemnification in respect of any
Claim asserted or made within such period shall continue until the final
disposition of such Claim; provided, further, however, that nothing contained in
this Section 4.11(e) shall be deemed to preclude the liquidation, consolidation
or merger of FNB or any FNB Subsidiary, in which case all of such rights to
indemnification and limitations on liability shall be deemed to so survive and
continue notwithstanding any such liquidation, consolidation or merger.

                  (f) M&T, from and after the Effective Date will use its best
efforts directly or indirectly to cause the persons who served as directors or
officers of FNB on or before the Effective Date to be covered by FNB's existing
directors' and officers' liability insurance policy (provided that M&T may
substitute therefor policies of at least the same coverage and amounts
containing terms and conditions which are not less advantageous than such
policy) but in no event shall any insured person be entitled under this Section
4.11(f) to insurance coverage more favorable than that provided to him or her in
such capacities at the date hereof with respect to acts or omissions resulting
from their service as such on or prior to the Effective Date. Such insurance
coverage, if reasonably available at a reasonable cost relative to the coverage
obtained, shall commence on the Effective Date and will be provided for a period
of no less than six years after the Effective Date; provided, however, that in
no event shall M&T be required to expend more than 150% of the current amount
expended by FNB (the "Insurance Amount") to maintain or procure insurance
coverage pursuant hereto and further provided that the Insurance Amount shall be
deemed reasonable for purposes of this Section 4.11(f). FNB agrees to renew any
such existing insurance or to purchase any "discovery period" insurance provided
for thereunder at M&T's request.

                  (g) In the event M&T or any of its successors or assigns (i)
consolidates with or merges into any other person and shall not be the
continuing or surviving corporation or entity of such consolidation or merger,
or (ii) transfers or conveys all or substantially all of its properties and
assets to any person, then, and in each such case, to the extent necessary,
proper provision shall be made so that the successors and assigns of M&T assume
the obligations set forth in this section.

                  (h) The provisions of Section 4.11(d), (e) and (f) are
intended to be for the benefit of, and shall be enforceable by, each Indemnified
Party and their respective heirs and representatives.

         4.12. FNB Subsidiaries

         FNB undertakes and agrees that, if so requested by M&T, it shall take
all necessary action to facilitate the merger of FNB Subsidiaries with
Subsidiaries of M&T or the dissolution of such FNB Subsidiaries effective at or
after the Effective Date; provided however, that in no event shall the Closing
be delayed in order to facilitate any such merger or dissolution and provided
further, however, that FNB shall not be required to take any action that could
adversely affect the qualification of the Merger as a reorganization within the
meaning of Section 368(a) of the Code.


                                     - 30 -



         4.13. Dividends

         After the date of this Agreement, each of M&T and FNB shall coordinate
with the other the declaration of any dividends in respect of M&T Common Stock
and FNB Common Stock and the record dates and payment dates relating thereto, it
being the intention of the parties hereto that holders of M&T Common Stock or
FNB Common Stock shall not receive two dividends, or fail to receive one
dividend, for any single calendar quarter with respect to their shares of M&T
Common Stock and/or FNB Common Stock and any shares of M&T Common Stock any such
holder receives in exchange therefor in the Merger.

         4.14. Advisory Boards

         Unless prohibited by applicable law, promptly following the Effective
Date, M&T shall cause those persons who are members of the Board of Directors of
FNB on the Effective Date (other than any such persons who shall be appointed to
the Board of Directors of M&T pursuant to Section 4.11(c) hereof) to be
appointed or elected for a period of not less than twenty-four months after the
Effective Date as members of the M&T Bank's Advisory Board, the function of
which is to advise M&T Bank on deposit and lending activities in FNB Bank's
former market area. Each such advisory director shall be paid the annual
retainer and meeting attendance fees Previously Disclosed in connection with
Section 4.14 hereof; provided, however, that notwithstanding anything else in
this Section 4.14, no attendance fees shall be paid for meetings not actually
attended and M&T Bank shall have no obligation to continue the services of any
advisory director who acts in a manner detrimental to M&T Bank.


                                   ARTICLE 5.
                              CONDITIONS PRECEDENT

         5.1. Conditions Precedent - M&T, Merger Sub and FNB

         The respective obligations of the parties to effect the Merger shall be
subject to satisfaction or waiver of the following conditions at or prior to the
Closing Date:

                  (a) All corporate action necessary to authorize the execution,
delivery and performance of this Reorganization Agreement and the Plan of Merger
and consummation of the transactions contemplated hereby and thereby shall have
been duly and validly taken;

                  (b) The parties hereto shall have received all regulatory
approvals required or mutually deemed necessary in connection with the
transactions contemplated by this Reorganization Agreement, the Plan of Merger
and the Bank Merger Agreement, all notice periods and waiting periods required
after the granting of any such approvals shall have passed and all conditions



                                     - 31 -



contained in any such approval required to have been satisfied prior to
consummation of such transactions shall have been satisfied, provided, however,
that no such approval shall have imposed any condition or requirement which, in
the reasonable opinion of the Board of Directors of M&T or FNB so materially and
adversely affects the anticipated economic and business benefits to M&T or FNB,
respectively, of the transactions contemplated by this Agreement as to render
consummation of such transactions inadvisable;

                  (c) The Registration Statement (including any post-effective
amendment thereto) shall be effective under the Securities Act, and no
proceeding shall be pending, or to the knowledge of M&T, threatened by the
Commission to suspend the effectiveness of such Registration Statement, and M&T
shall have received all state securities or "Blue Sky" permits or other
authorizations, or confirmations as to the availability of an exemption from
registration requirements as may be necessary;

                  (d) To the extent that any lease, license, loan, financing
agreement or other contract or agreement to which FNB or any FNB Subsidiary is a
party requires the consent of or waiver from the other party thereto as a result
of the transactions contemplated by this Agreement, such consent or waiver shall
have been obtained, unless the failure to obtain such consents or waivers,
individually or in the aggregate, would not have a Material Adverse Effect on
FNB;

                  (e) None of the parties hereto shall be subject to any order,
decree or injunction of a court or agency of competent jurisdiction which
enjoins or prohibits the consummation of the transactions contemplated by this
Reorganization Agreement and the Plan of Merger; and

                  (f) The shares of M&T Common Stock that may be issued in the
Merger which shall have been approved for listing on the NYSE, subject to
official notice of issuance; and

                  (g) M&T and FNB shall have received an opinion of Arnold &
Porter, in form and substance reasonably satisfactory to M&T and FNB, dated as
of the Effective Date, substantially to the effect that, on the basis of facts,
representations and assumptions set forth in such opinion which are consistent
with the state of facts existing on the Effective Date, the Merger should be
treated for federal income tax purposes as a reorganization or part of a
reorganization within the meaning of Section 368(a) of the Code, and that,
provided the Merger is such a reorganization:

                         (i) FNB and M&T will each be a party to such
reorganization within the meaning of Section 368(b) of the Code;

                         (ii) No gain or loss will be recognized by M&T, Merger
Sub or FNB as a result of the Merger (except for amounts resulting from any
required change in accounting methods, any income and deferred gain recognized
pursuant to Treasury regulations issued under Section 1502 of the Code, or other
exceptions as set forth in such opinion);


                                     - 32 -



                         (iii) No gain or loss will be recognized by FNB
shareholders with respect to shares of M&T Common Stock received in exchange for
all of their shares of FNB Common Stock;

                         (iv) The gain, if any, realized by FNB shareholders who
receive M&T Common Stock and cash (other than cash in lieu of a fractional share
interest of M&T Common Stock) in exchange for their shares of FNB Common Stock,
will be recognized by each such shareholder, but in an amount not in excess of
the amount of cash received. If the exchange has the effect of the distribution
of a dividend, then the amount of the gain recognized shall be treated as a
dividend. No loss will be recognized by such FNB shareholder on the exchange;

                         (v) In general, cash received by a FNB shareholder who
receives solely cash in exchange for his or her shares of FNB Common Stock will
be treated as having been received by such shareholder as a distribution in
redemption of his or her shares of FNB Common Stock. If, however, any such FNB
shareholder constructively owns shares of FNB Common Stock that are exchanged
for M&T Common Stock in the Merger or owns shares of M&T Common Stock actually
or constructively after the Merger, part or all of the cash received may be
treated as ordinary income to the extent of the shareholder's ratable share of
FNB's accumulated earnings and profits if the receipt of the cash has the effect
of a distribution of a dividend with respect to such shareholder;

                         (vi) Each FNB shareholder's aggregate tax basis in any
shares of M&T Common Stock received in the transaction will be the same as the
aggregate tax basis of the shares of FNB Common Stock such shareholder
surrendered in the exchange therefor, decreased by the amount of any cash
received by the shareholder and increased by the amount which was treated as a
dividend and any gain recognized (not including any portion which was treated as
a dividend) by the shareholder in the exchange; and

                         (vii) Each FNB shareholder's holding period in any
shares of M&T Common Stock received in the transaction will, in each instance,
include the period during which the shares of FNB Common Stock surrendered in
exchange therefor were held, provided that such shares of FNB Common Stock were
held as capital assets by the shareholder on the Effective Date.

         In rendering the opinion described in this subsection (g), Arnold &
Porter will rely on representations and facts as provided by M&T and FNB,
including without limitation the standard representations set forth in Revenue
Procedure 86-42, 1986-2 C.B. 722.

         5.2. Conditions Precedent - FNB

         The obligations of FNB to effect the Merger shall be subject to
satisfaction of the following additional conditions at or prior to the Closing
Date unless waived by FNB pursuant to Section 6.4 hereof:


                                     - 33 -



                  (a) The representations and warranties of M&T and Merger Sub
set forth in Article 3 hereof shall be true and correct in all material respects
as of the date of this Reorganization Agreement and as of the Closing Date as
though made on and as of the Closing Date (or on the date when made in the case
of any representation and warranty which specifically relates to an earlier
date), except as otherwise contemplated by this Reorganization Agreement or
consented to in writing by FNB; provided, however, that (i) in determining
whether or not the condition contained in this paragraph (a) shall be satisfied,
no effect shall be given to any exceptions in such representations and
warranties relating to materiality or Material Adverse Effect and (ii) the
condition contained in this paragraph (a) shall be deemed to be satisfied unless
the failure of such representations and warranties to be so true and correct
constitute, individually or in the aggregate, a Material Adverse Effect on M&T;

                  (b) M&T and Merger Sub shall have in all material respects
performed all obligations and complied with all covenants required by this
Reorganization Agreement and the Plan of Merger to be performed or complied with
at or prior to the Closing Date;

                  (c) Each of M&T and Merger Sub shall have delivered to FNB a
certificate, dated the Closing Date and signed by its respective Chairman, CEO,
Executive Vice President or Senior Vice President to the effect that the
conditions set forth in paragraphs (a) and (b) of this section have been
satisfied; and

                  (d) FNB shall have received from PriceWaterhouseCoopers,
L.L.P. letters dated not more than five days prior to (i) the effective date of
the Registration Statement and (ii) the Closing Date, with respect to certain
financial information regarding M&T, each in form and substance which is
customary in transactions of the nature contemplated by this Agreement.

         5.3. Conditions Precedent - M&T and Merger Sub

         The respective obligations of M&T and Merger Sub to effect the Merger
shall be subject to satisfaction of the following additional conditions at or
prior to the Closing Date unless waived by M&T pursuant to Section 6.4 hereof:

                  (a) The representations and warranties of FNB set forth in
Article 2 hereof shall be true and correct in all material respects as of the
date of this Reorganization Agreement and as of the Closing Date as though made
on and as of the Closing Date (or on the date when made in the case of any
representation and warranty which specifically relates to an earlier date),
except as otherwise contemplated by this Reorganization Agreement or consented
to in writing by M&T; provided, however, that (i) in determining whether or not
the condition contained in this paragraph (a) shall be satisfied, no effect
shall be given to any exceptions in such representations and warranties relating
to materiality or Material Adverse Effect and (ii) the condition contained in
this paragraph (a) shall be deemed to be satisfied unless the failure of such
representations and warranties to be so true and correct constitute,
individually or in the aggregate, a Material Adverse Effect on FNB;


                                     - 34 -



                  (b) FNB shall have in all material respects performed all
obligations and complied with all covenants required by this Reorganization
Agreement and the Plan of Merger to be performed or complied with at or prior to
the Closing Date;

                  (c) FNB shall have delivered to M&T and Merger Sub a
certificate, dated the Closing Date and signed by its Chairman, President and
Chief Executive Officer or any Executive Vice President to the effect that the
conditions set forth in paragraphs (a) and (b) of this section have been
satisfied;

                  (d) M&T shall have received from KPMG Peat Marwick, L.L.P.
letters dated not more than five days prior to (i) the effective date of the
Registration Statement and (ii) the Closing Date, with respect to certain
financial information regarding FNB, each in form and substance which is
customary in transactions of the nature contemplated by this Agreement; and

                  (e) Dissenters' rights shall not have been exercised with
respect to more than 10% of the outstanding shares of FNB Common Stock.


                                   ARTICLE 6.
                        TERMINATION, WAIVER AND AMENDMENT

         6.1. Termination

         This Reorganization Agreement and the Plan of Merger may be terminated,
either before or after approval by the shareholders of FNB:

                  (a) At any time on or prior to the Effective Date, by the
mutual consent in writing of the parties hereto;

                  (b) At any time on or prior to the Closing Date, by M&T in
writing, if FNB has, or by FNB in writing, if M&T or Merger Sub has, in any
material respect, breached (i) any covenant or agreement contained herein or in
the Plan of Merger or (ii) any representation or warranty contained herein, and
in either case if (x) such breach has not been cured by the earlier of 30 days
after the date on which written notice of such breach is given to the party
committing such breach or the Closing Date and (y) such breach would entitle the
non-breaching party not to consummate the transactions contemplated hereby under
Article V hereof;

                  (c) At any time, by any party hereto in writing, if the
applications for prior approval referred to in Section 4.3 hereof have been
denied, and the time period for appeals and requests for reconsideration has
run, or if any governmental entity of competent jurisdiction shall have issued a
final nonappealable order enjoining or otherwise prohibiting the Merger;

                  (d) At any time, by any party hereto in writing, if the
shareholders of FNB do not approve the transactions contemplated herein at the
special meetings duly called for that purpose;

                  (e) By any party hereto in writing, if the Closing Date has
not occurred by the close of business on September 30, 1999 unless the failure
of the Closing to occur by such date shall be due to the failure of the party
seeking to terminate this Agreement to perform or observe the covenants and
agreements set forth herein; or


                                     - 35 -



                  (f) By FNB, upon the execution by FNB of a definitive
agreement relating to a takeover proposal (as defined in Section 4.7(b)(13)),
provided that (i) FNB shall have complied with its obligations under Section
4.7(b)(13) hereof, (ii) the Board of Directors of FNB shall have determined,
after having received the advice of outside legal counsel to FNB and the advice
of FNB's financial advisor, that such action is necessary for the Board of
Directors to act in a manner consistent with its fiduciary duties under
applicable law and (iii) concurrent with its notification of termination, FNB
will wire to an account designated by M&T $13 million in immediately available
funds.

         6.2. Effect of Termination

         In the event this Reorganization Agreement and the Plan of Merger is
terminated pursuant to Section 6.1 hereof, this Agreement and the Plan of Merger
shall become void and have no effect, except that (i) the provisions relating to
confidentiality and expenses set forth in Sections 4.5 and 7.1 hereof,
respectively, shall survive any such termination and (ii) a termination pursuant
to Section 6.1(b)(i) or (b)(ii) shall not relieve the breaching party from
liability for an uncured willful breach of such covenant or agreement or
representation or warranty giving rise to such termination.

         6.3. Survival of Representations, Warranties and Covenants

         All representations, warranties and covenants in this Reorganization
Agreement and the Plan of Merger or in any instrument delivered pursuant hereto
or thereto shall expire on, and be terminated and extinguished at, the Effective
Date other than covenants that by their terms are to survive or be performed
after the Effective Date, provided that no such representations, warranties or
covenants shall be deemed to be terminated or extinguished so as to deprive M&T,
Merger Sub or FNB (or any director, officer or controlling person thereof) of
any defense in law or equity which otherwise would be available against the
claims of any person, including, without limitation, any shareholder or former
shareholder of either M&T or FNB, the aforesaid representations, warranties and
covenants being material inducements to the consummation by M&T, Merger Sub and
FNB of the transactions contemplated herein.

         6.4. Waiver

         Except with respect to any required shareholder or regulatory approval,
M&T and FNB, respectively, by written instrument signed by an executive officer
of such party, may at any time (whether before or after approval of this
Reorganization Agreement and the Plan of Merger by the shareholders of M&T and
FNB) extend the time for the performance of any of the obligations or other acts
of FNB, on the one hand, or M&T or Merger Sub, on the other hand, and may waive
(i) any inaccuracies of such parties in the representations or warranties
contained in this Agreement, the Plan of Merger or any document delivered
pursuant hereto or thereto, (ii) compliance with any of the covenants,
undertakings or agreements of such parties, or satisfaction of any of the
conditions precedent to its obligations, contained herein or in the Plan of


                                     - 36 -



Merger or (iii) the performance by such parties of any of its obligations set
out herein or therein; provided, however, that no such waiver executed after
approval of this Reorganization Agreement and the Plan of Merger by the
shareholders of M&T or FNB shall change the number of shares of M&T Common Stock
into which each share of FNB Common Stock shall be converted pursuant to the
Merger.

         6.5. Amendment or Supplement

         This Reorganization Agreement and the Plan of Merger may be amended or
supplemented at any time only by mutual agreement of the parties hereto or
thereto. Any such amendment or supplement must be in writing and approved by
their respective boards of directors and/or officers authorized thereby and
shall be subject to the proviso in Section 6.4 hereto.


                                   ARTICLE 7.
                                  MISCELLANEOUS

         7.1. Expenses

         Each party hereto shall bear and pay all costs and expenses incurred by
it in connection with the transactions contemplated in this Reorganization
Agreement, including fees and expenses of its own financial consultants,
accountants and counsel, except that M&T and FNB each shall bear and pay 50% of
all printing and mailing costs and filing fees associated with the Registration
Statement and the Proxy Statement.

         7.2. Entire Agreement

         This Reorganization Agreement, the Plan of Merger and the Option
Agreement contain the entire agreement between the parties with respect to the
transactions contemplated hereunder and thereunder and supersede all prior
arrangements or understandings with respect thereto, written or oral, other than
documents referred to herein or therein and the Confidentiality Agreements.
Notwithstanding any provision of any of the aforementioned agreements, the
parties agree that M&T may purchase FNB Common Stock in open market or
negotiated transactions prior to the Effective Date, not to exceed 5% of the
outstanding FNB Common Stock and subject to any applicable legal restrictions.
The terms and conditions of this Reorganization Agreement and the Plan of Merger
shall inure to the benefit of and be binding upon the parties hereto and thereto
and their respective successors. Except as specifically set forth herein, or in
the Plan of Merger, nothing in this Reorganization Agreement or the Plan of
Merger, expressed or implied, is intended to confer upon any party, other than
the parties hereto and thereto, and their respective successors, any rights,
remedies, obligations or liabilities. This Reorganization Agreement and the Plan
of Merger, taken together, shall constitute a plan of reorganization within the
meaning of Section 368 of the Code.

         7.3. No Assignment

         No party hereto may assign any of its rights or obligations under this
Reorganization Agreement to any other person.


                                     - 37 -



         7.4. Notices

         All notices or other communications which are required or permitted
hereunder shall be in writing and sufficient if delivered personally or sent by
facsimile transmission or overnight express or by registered or certified mail,
postage prepaid, addressed as follows:

         If to FNB:

                    FNB Rochester Corp.
                    35 State Street
                    Rochester, New York 14614
                    Attn: R. Carlos Carballada,
                          President and Chief Executive Officer
                    Facsimile No: (716) 258-1672

         With a required copy to:

                    FNB Rochester Corp.
                    35 State Street
                    Rochester, New York 14614
                    Attn: Timothy Johnson, Esquire
                          Vice President and Counsel
                    Facsimile No: (716) 258-1672

                    and to:

                    Muldoon, Murphy & Farcette
                    5101 Wisconsin Avenue, N.W.
                    Washington, D.C. 20016
                    Attn: Lawrence M. F. Spaccasi, Esquire
                    Facsimile No: (202) 966-9409

         If to M&T or Merger Sub:

                    M&T Bank Corporation
                    One M&T Plaza
                    Buffalo, NY 14240
                    Attn: Michael Pinto,
                          Executive Vice President and Chief Financial Officer
                    Facsimile No: (716) 842-5177


                                     - 38 -



         With a required copy to:

                     M&T Bank Corporation
                     One M&T Plaza
                     Buffalo, NY 14240
                     Attn: Richard A. Lammert, Esquire
                           Senior Vice President and General Counsel
                     Facsimile No: (716) 842-5177

                     and to:

                     Arnold & Porter
                     555 Twelfth Street, N.W.
                     Washington, D.C. 20004
                     Attn: Steven Kaplan, Esquire
                     Facsimile No: (202) 942-5999

         7.5. Captions

         The captions contained in this Reorganization Agreement are for
reference purposes only and are not part of this Reorganization Agreement.

         7.6. Counterparts

         This Reorganization Agreement may be executed in any number of
counterparts, and each such counterpart shall be deemed to be an original
instrument, but all such counterparts together shall constitute but one
agreement.

         7.7. Governing Law

         This Reorganization Agreement shall be governed by and construed in
accordance with the laws of the State of New York applicable to agreements made
and entirely to be performed within such jurisdiction, except to the extent
federal law may be applicable.


               [Remainder of this page left intentionally blank.]


                                     - 39 -



                  IN WITNESS WHEREOF, the parties hereto, intending to be
legally bound hereby, have caused this Reorganization Agreement to be executed
in counterparts by their duly authorized officers and their corporate seal to be
hereunto affixed and attested by their officers thereunto duly authorized, all
as of the day and year first above written.


Attest                                  M&T BANK CORPORATION



/s/ Marie King                          By /s/ Gary S. Paul
- ------------------------                   -------------------------------------
Marie King                                 Gary S. Paul
Corporate Secretary                        Senior Vice President


(SEAL)


Attest                                  OLYMPIA FINANCIAL CORP.



/s/ Marie King                          By /s/ Gary S. Paul
- ------------------------                   -------------------------------------
Marie King                                 Gary S. Paul
Corporate Secretary                        Treasurer and Assistant Secretary


(SEAL)


Attest                                  FNB ROCHESTER CORP.



/s/ Mariann Joyal                       By /s/ R. Carlos Carballada
- ------------------------                   -------------------------------------
Mariann Joyal                              R. Carlos Carballada
Secretary                                  President and Chief Executive Officer


(SEAL)


                                     - 40 -



                                                                         Annex A

                         AGREEMENT AND PLAN OF MERGER OF
            FNB ROCHESTER CORP. WITH AND INTO OLYMPIA FINANCIAL CORP.

         AGREEMENT AND PLAN OF MERGER ("Plan of Merger") dated as of December 9,
1998 by and between FNB ROCHESTER CORP. ("FNB"), a New York corporation having
its principal executive office at 35 State Street, Rochester, New York, 14614,
and OLYMPIA FINANCIAL CORP. ("Merger Sub"), a Delaware corporation having its
principal executive office at 1209 Orange Street, Wilmington Delaware, and
joined in by M&T BANK CORPORATION ("M&T"), a New York corporation having its
principal executive office at One M&T Plaza, Buffalo New York, 14240.


                                   WITNESSETH

         WHEREAS, the respective Boards of Directors of FNB, Merger Sub and M&T
deem the merger of FNB with and into Merger Sub, under and pursuant to the terms
and conditions herein set forth or referred to, desirable and in the best
interests of the respective corporations and their respective shareholders, and
the respective Boards of Directors of FNB, Merger Sub and M&T have adopted
resolutions approving this Plan of Merger and an Agreement and Plan of
Reorganization dated of even date herewith ("Reorganization Agreement"); and

         WHEREAS, the parties hereto desire that FNB shall be acquired by M&T
through the merger of FNB with and into Merger Sub, with Merger Sub as the
surviving corporation, subject to the terms and conditions of this Plan of
Merger and the Reorganization Agreement; and

         WHEREAS, the parties hereto intend that the Merger shall qualify as or
be part of a tax-free reorganization under Section 368(a) of the Internal
Revenue Code of 1986, as amended ("Code").

         NOW, THEREFORE, in consideration of the premises and of the mutual
agreements herein contained, the parties hereto do hereby agree as follows:


                                   ARTICLE I
                                     MERGER

         Subject to the terms and conditions of this Plan of Merger, at the
Effective Time (as hereinafter defined), FNB shall be merged with and into
Merger Sub, pursuant to the provisions of, and with the effect provided in the
New York Business Corporation Law and the Delaware General Corporation Law (said
transaction being hereinafter referred to as the "Merger"). At the Effective
Time, the separate existence of FNB shall cease and Merger Sub, as the surviving
entity, shall continue unaffected and unimpaired by the Merger. (Merger Sub as
existing at and after the Effective Time being hereinafter sometimes referred to
as the "Surviving Corporation").


                                     - 1 -



                                   ARTICLE II
                    CERTIFICATE OF INCORPORATION AND BY-LAWS

         The Certificate of Incorporation and the Bylaws of Merger Sub in effect
immediately prior to the Effective Time shall be the Certificate of
Incorporation and the Bylaws of the Surviving Corporation, in each case until
amended in accordance with applicable law.


                                  ARTICLE III
                               BOARD OF DIRECTORS

         The directors and officers of Merger Sub immediately prior to the
Effective Time shall be the directors and officers of the Surviving Corporation,
each to hold office in accordance with the Certificate of Incorporation and
Bylaws of the Surviving Corporation.


                                   ARTICLE IV
                                     CAPITAL

         At the Effective Time, all of the shares of capital stock of Merger Sub
issued and outstanding immediately prior to the Effective Time shall remain
outstanding and unchanged by virtue of the Merger and shall constitute all of
the issued and outstanding shares of capital stock of the Surviving Corporation.


                                   ARTICLE V
                         CONVERSION AND EXCHANGE OF FNB
                       SHARES; FRACTIONAL SHARE INTERESTS

         1. At the Effective Time, each share of the common stock of FNB, par
value $1.00 per share ("FNB Common Stock"), issued and outstanding immediately
prior to the Effective Time (except as provided in Section 2 of this Article V,
and subject to Sections 5 and 7 of this Article V), shall, by virtue of the
Merger, automatically and without any action on the part of the holder thereof,
become and be converted into, at the election of the holder as provided in and
subject to the limitations set forth in this Article V, either (i) the right to
receive $33.00 in cash without interest (the "Cash Consideration") or (ii)
0.06766 of a share (the "Exchange Ratio") of common stock, par value $5.00 per
share, of M&T ("M&T Common Stock") (the "Stock Consideration"). The Cash
Consideration and the Stock Consideration are sometimes referred to herein
collectively as the "Merger Consideration."

         2. (a) At the Effective Time, all shares of FNB Common Stock held in
the treasury of FNB or owned beneficially by any Subsidiary of FNB other than in
a fiduciary capacity ("Trust Account Shares") or in connection with a debt
previously contracted ("DPC Shares") and all shares of FNB Common Stock owned by
M&T or owned beneficially by any subsidiary of M&T other than Trust Account
Shares and DPC Shares shall be canceled and no cash, stock or other property
shall be delivered in exchange therefor.

            (b) Notwithstanding any other provision contained in this Plan of
Merger, no shares of FNB Common Stock that are issued and outstanding as of the
Effective Time and that are held by a stockholder who has properly exercised his
appraisal rights (any such shares being referred to herein as "Dissenting


                                     - 2 -



Shares") under applicable law shall be converted into the right to receive the
Merger Consideration as provided in Section 1 of this Article V unless and until
the holder shall have failed to perfect, or shall have effectively withdrawn or
lost, his right to dissent from the Merger under applicable law and to receive
such consideration as may be determined to be due with respect to such
Dissenting Shares pursuant to and subject to the requirements of applicable law.
If any such holder shall have so failed to perfect or effectively withdrawn or
lost such right prior to the Election Deadline (as defined herein), each of such
holder's shares of FNB Common Stock shall thereupon be deemed to be Non-Election
Shares (as defined herein) for all purposes under this Article V. If any holder
of Dissenting Shares shall have so failed to perfect or effectively withdrawn or
lost such holder's right to dissent from the Merger after the Election Deadline,
each of such holder's shares of FNB Common Stock shall thereupon be deemed to
have been converted into and to have become, as of the Effective Time, the right
to receive the Stock Consideration or the Cash Consideration or a combination
thereof as determined by M&T in its sole discretion.

         3. (a) An election form (an "Election Form") and other appropriate and
customary transmittal materials, which shall specify that delivery shall be
effected, and risk of loss and title to the certificates theretofore
representing FNB Common Stock ("Certificates") shall pass, only upon proper
delivery of such Certificates to a bank or trust company designated by M&T and
reasonably satisfactory to FNB (the "Exchange Agent") in such form as FNB and
M&T shall mutually agree shall be mailed on the Mailing Date (as defined below)
to each holder of record of shares of FNB Common Stock (other than holders of
Dissenting Shares or shares of FNB Common Stock to be cancelled as provided in
Section 2(a) of this Article V) as of a record date which shall be the same date
as the record date for eligibility to vote on the Merger. The "Mailing Date"
shall be the date on which proxy materials relating to the Merger are mailed to
holders of shares of FNB Common Stock.

            (b) Each Election Form shall entitle the holder of shares of FNB
Common Stock (or the beneficial owner through appropriate and customary
documentation and instructions) to (i) elect to receive the Cash Consideration
for all of such holder's shares (a "Cash Election"), (ii) elect to receive the
Stock Consideration for all of such holder's shares (a "Stock Election"), (iii)
elect to receive the Cash Consideration with respect to some of such holder's
shares and the Stock Consideration with respect to such holder's remaining
shares (a "Mixed Election"), or (iv) make no election or to indicate that such
holder has no preference as to the receipt of the Cash Consideration or the
Stock Consideration (a "Non-Election"), provided, however, that a holder may
make a Mixed Election only if such election would result in a Cash Election with
respect to at least 100 shares of FNB Common Stock and a Stock Election with
respect to at least 100 shares of FNB Common Stock. Holders of record of shares
of FNB Common Stock who hold such shares as nominees, trustees or in other
representative capacities (a "Representative") may submit multiple Election
Forms, provided that such Representative certifies that each such Election Form
covers all the shares of FNB Common Stock held by that Representative for a
particular beneficial owner. Shares of FNB Common Stock as to which a Cash
Election has been made (including pursuant to a Mixed Election) are referred to
herein as "Cash Election Shares." Shares of FNB Common Stock as to which a Stock
Election has been made (including pursuant to a Mixed Election) are referred to
herein as "Stock Election Shares." Shares of FNB Common Stock as to which no
election has been made are referred to as "Non-Election Shares." The aggregate
number of shares of FNB Common Stock with respect to which a Stock Election has
been made is referred to herein as the "Stock Election Number."


                                     - 3 -



            (c) To be effective, a properly completed Election Form shall be
submitted to the Exchange Agent on or before 5:00 p.m. New York City time on the
20th calendar day following the Mailing Date (or such other time and date as FNB
and M&T may mutually agree) (the "Election Deadline"). An election shall have
been properly made only if the Exchange Agent shall have actually received a
properly completed Election Form by the Election Deadline. An Election Form
shall be deemed properly completed only if accompanied by one or more
Certificates (or customary affidavits and, if required by M&T pursuant to
Section 8 of this Article V, indemnification regarding the loss or destruction
of such Certificates or the guaranteed delivery of such Certificates)
representing all shares of FNB Common Stock covered by such Election Form,
together with duly executed transmittal materials included with the Election
Form. Any FNB stockholder may at any time prior to the Election Deadline change
his or her election by written notice received by the Exchange Agent prior to
the Election Deadline accompanied by a properly completed and signed revised
Election Form. Any FNB stockholder may, at any time prior to the Election
Deadline, revoke his or her election by written notice received by the Exchange
Agent prior to the Election Deadline or by withdrawal prior to the Election
Deadline of his or her Certificates, or of the guarantee of delivery of such
Certificates, previously deposited with the Exchange Agent. All elections shall
be revoked automatically if the Exchange Agent is notified in writing by M&T and
FNB that this Plan of Merger has been terminated. If a stockholder either (i)
does not submit a properly completed Election Form by the Election Deadline, or
(ii) revokes its Election Form prior to the Election Deadline, the shares of FNB
Common Stock held by such stockholder shall be designated "Non-Election Shares."
M&T shall cause the Certificates representing FNB Common Stock described in (ii)
to be promptly returned without charge to the person submitting the Election
Form upon written request to that effect from the person who submitted the
Election Form. Subject to the terms of this Plan of Merger and of the Election
Form, the Exchange Agent shall have reasonable discretion to determine whether
any election, revocation or change has been properly or timely made and to
disregard immaterial defects in any Election Form, and any good faith decisions
of the Exchange Agent regarding such matters shall be binding and conclusive.

            (d) Notwithstanding any other provision contained in this Plan of
Merger, 50% of the total number of shares of FNB Common Stock outstanding on the
date hereof, less 50% of the aggregate number of shares of FNB Common Stock
acquired by M&T or FNB prior to the Effective Time (the "Stock Conversion
Number") shall be converted into the Stock Consideration and the remaining
outstanding shares of FNB Common Stock shall be converted into the Cash
Consideration (in each case, excluding (x) shares of FNB Common Stock to be
cancelled as provided in Section 2(a) of this Article V and (y) Dissenting
Shares (the shares remaining outstanding after such exclusion constituting, for
purposes of this Agreement, the "Outstanding FNB Shares")); provided, however,
that for federal income tax purposes, it is intended that the Merger will
qualify as a reorganization under the provisions of Section 368(a) of the Code
and, notwithstanding anything to the contrary contained herein, in order that
the Merger will not fail to satisfy continuity of interest requirements under
applicable federal income tax principles relating to reorganizations under
Section 368(a) of the Code, as reasonably determined by Arnold & Porter, M&T
shall increase the number of outstanding FNB shares that will be converted into
the Stock Consideration and reduce the number of outstanding FNB shares that
will be converted into the right to receive the Cash Consideration.


                                     - 4 -



            (e) Within five business days after the later to occur of the
Election Deadline or the Effective Time, M&T shall cause the Exchange Agent to
effect the allocation among holders of FNB Common Stock of rights to receive the
Cash Consideration and the Stock Consideration as follows:

                  (i) If the Stock Election Number exceeds the Stock Conversion
         Number, then all Cash Election Shares and all Non-Election Shares shall
         be converted into the right to receive the Cash Consideration, and,
         subject to Section 7 of this Article V, each holder of Stock Election
         Shares will be entitled to receive the Stock Consideration in respect
         of that number of Stock Election Shares equal to the product obtained
         by multiplying (x) the number of Stock Election Shares held by such
         holder by (y) a fraction, the numerator of which is the Stock
         Conversion Number and the denominator of which is the Stock Election
         Number, with the remaining number of such holder's Stock Election
         Shares being converted into the right to receive the Cash
         Consideration;

                  (ii) If the Stock Election Number is less than the Stock
         Conversion Number (the amount by which the Stock Conversion Number
         exceeds the Stock Election Number being referred to herein as the
         "Shortfall Number"), then all Stock Election Shares shall be converted
         into the right to receive the Stock Consideration and the Non-Election
         Shares and Cash Election Shares shall be treated in the following
         manner:

                           (A) if the Shortfall Number is less than or equal to
                  the number of Non-Election Shares, then all Cash Election
                  Shares shall be converted into the right to receive the Cash
                  Consideration and, subject to Section 7 of Article V, each
                  holder of Non-Election Shares shall receive the Stock
                  Consideration in respect of that number of Non-Election Shares
                  equal to the product obtained by multiplying (x) the number of
                  Non-Election Shares held by such holder by (y) a fraction, the
                  numerator of which is the Shortfall Number and the denominator
                  of which is the total number of Non-Election Shares, with the
                  remaining number of such holder's Non-Election Shares being
                  converted into the right to receive the Cash Consideration; or

                           (B) if the Shortfall Number exceeds the number of
                  Non-Election Shares, then all Non-Election Shares shall be
                  converted into the right to receive the Stock Consideration,
                  and, subject to Section 7 of this Article V, each holder of
                  Cash Election Shares shall receive the Stock Consideration in
                  respect of that number of Cash Election Shares equal to the
                  product obtained by multiplying (x) the number of Cash
                  Election Shares held by such holder by (y) a fraction, the
                  numerator of which is the amount by which (1) the Shortfall
                  Number exceeds (2) the total number of Non-Election Shares and
                  the denominator of which is the total number of Cash Election
                  Shares, with the remaining number of such holder's Cash
                  Election Shares being converted into the right to receive the
                  Cash Consideration.


                                     - 5 -



            For purposes of this Section 3(e), if M&T is obligated to increase
the number of Outstanding FNB Shares to be converted into shares of M&T Common
Stock as a result of the application of the last clause of Section 3(d) above,
then the higher number shall be substituted for the Stock Conversion Number in
the calculations set forth in this Section 3(e).

            (f) All of the shares of FNB Common Stock converted into and
exchangeable for the Merger Consideration pursuant to this Article V shall no
longer be outstanding and shall automatically be cancelled and cease to exist as
of the Effective Time. Each Certificate previously representing any such shares
of FNB Common Stock shall thereafter represent the right to receive the Merger
Consideration pursuant to this Article V, as allocated among the holders of FNB
Common Stock in accordance with this Section 3.

            (g) At the Effective Time, M&T shall deposit, or shall cause to be
deposited, with the Exchange Agent, for exchange in accordance with this Section
3, certificates representing the aggregate number of shares of M&T Common Stock
into which the outstanding shares of FNB Common Stock shall be converted
pursuant to this Article V, and cash in the amount of the aggregate Cash
Consideration and the aggregate amount of cash to be paid in lieu of fractional
shares. As soon as practicable after the Effective Time, the Exchange Agent
shall mail to all holders of record of FNB Common Stock who did not previously
submit completed Election Forms letters of transmittal specifying the procedures
for the delivery of such holders' certificates to the Exchange Agent and
describing the Merger Consideration such holders will receive therefor. Also as
soon as practicable after the Effective Time (with allowance for the mailing of
the letters of transmittal described in the preceding sentence), the Exchange
Agent shall distribute to holders of shares of FNB Common Stock, upon surrender
to the Exchange Agent (to the extent not previously surrendered with an Election
Form) of one or more Certificates for cancellation, (i) a certificate
representing that number of whole shares of M&T Common Stock, if any, that such
holder has the right to receive pursuant to this Plan of Merger, and (ii) a
check for an amount equal to the cash, if any, which such holder has the right
to receive pursuant to this Plan of Merger (including any cash in lieu of any
fractional shares of M&T Common Stock to which such holder is entitled pursuant
to Section 7 hereof and any dividends or other distributions to which such
holder is entitled pursuant to the provisions set forth below). In no event
shall the holder of any such surrendered Certificates be entitled to receive
interest on any of the Cash Consideration or cash in lieu of fractional share
interests to be received in the Merger. If a check is to be issued in the name
of a person other than the person in whose name the Certificates surrendered for
exchange therefor are registered, it shall be a condition of the exchange that
the person requesting such exchange shall pay to the Exchange Agent any transfer
taxes required by reason of issuance of such check to a person other than the
registered holder of the Certificates surrendered, or shall establish to the
reasonable satisfaction of the Exchange Agent that such tax has been paid or is
not applicable. No dividends or other distributions declared after the Effective
Time with respect to M&T Common Stock shall be paid to the holder of any
unsurrendered Certificate until the holder thereof shall surrender such
Certificate in accordance with this Article V. After the surrender of a


                                     - 6 -



Certificate in accordance with this Article V, the record holder thereof shall
be entitled to receive any such dividends or other distributions, without any
interest thereon, which theretofore had become payable with respect to shares of
M&T Common Stock, if any, represented by such Certificate. Certificates
surrendered for exchange by any person who is an "affiliate" of FNB for purposes
of Rule 145(c) under the Securities Act of 1933, as amended, shall not be
exchanged for certificates representing shares of M&T Common Stock until M&T has
received the written agreement of such person contemplated by Section 4.10 of
the Reorganization Agreement. If any certificate for shares of M&T Common Stock
is to be issued in a name other than that in which a Certificate surrendered for
exchange is issued, the Certificate so surrendered shall be properly endorsed
and otherwise in proper form for transfer and the person requesting such
exchange shall affix any requisite stock transfer tax stamps to the Certificate
surrendered or provide funds for their purchase or establish to the reasonable
satisfaction of M&T or its agent that such taxes have been paid or are not
payable.

         4. At the Effective Time, the stock transfer books of FNB shall be
closed and no transfer of FNB Common Stock shall thereafter be made or
recognized. If, after the Effective Time, Certificates representing such shares
are presented for transfer to the Exchange Agent, they shall be cancelled and
exchanged for the Merger Consideration as provided in this Article V. Any other
provision of this Plan of Merger notwithstanding, neither M&T or its agent nor
any party to the Merger shall be liable to a holder of FNB Common Stock for any
amount paid or properly delivered in good faith to a public official pursuant to
any applicable abandoned property, escheat or similar law.

         5. In the event that prior to the Effective Time, the outstanding
shares of M&T Common Stock shall have been increased, decreased or changed into
or exchanged for a different number or kind of shares or securities by
reorganization, recapitalization, reclassification, stock dividend, stock split
or other like changes in M&T's capitalization, then an appropriate and
proportionate adjustment shall be made to the Stock Consideration (including the
Exchange Ratio) and the formulas contained in Section 6 of this Article V.

         6. At the Effective Time, each option granted by FNB to purchase shares
of FNB Common Stock, which is outstanding and unexercised immediately prior to
the Effective Time (whether vested or not), shall be adjusted so as to entitle
the grantee thereof to immediately receive, in cancellation of such option, an
amount in cash computed by multiplying (i) the difference between (x) $33.00 and
(y) the per share exercise price applicable to such option by (ii) the number of
such shares of Company Common Stock subject to such option. FNB agrees to take
or cause to be taken all action necessary under such options to provide for such
adjustment. M&T shall make the payments required to be made to grantees of
options under this Section 6 at the Effective Time, subject to any applicable
tax withholding requirements.

         7. Notwithstanding any other provision hereof, each holder of shares of
FNB Common Stock who would otherwise have been entitled to receive pursuant to
this Article V a fraction of a share of M&T Common Stock (after taking into
account all Certificates delivered by such holder) shall receive, in lieu
thereof, cash in an amount equal to such fraction of a share of M&T Common Stock
multiplied by the market value (as defined below) of M&T Common Stock. The
"market value" of M&T Common Stock shall be the closing price of the M&T Common
Stock on the New York Stock Exchange -- Composite Transactions List (as reported
by The Wall Street Journal or, if not reported therein, another comparable
authoritative source) for the trading day immediately preceding the date on
which the Effective Time occurs. No such holder shall be entitled to dividends,
voting rights or any other shareholder right in respect of such fractional
share.


                                     - 7 -



         8. In the event any Certificate shall have been lost, stolen or
destroyed, upon the making of an affidavit of that fact by the person claiming
such Certificate to be lost, stolen or destroyed and, if required by M&T, the
posting by such person of a bond in such amount as M&T may reasonably direct as
indemnity against any claim that may be made against it with respect to such
Certificate, the Exchange Agent will issue in exchange for such lost, stolen or
destroyed Certificate the shares of M&T Common Stock constituting the Stock
Consideration and cash in lieu of fractional shares and/or the cash constituting
the Cash Consideration deliverable in respect thereof pursuant to this Plan of
Merger.


                                   ARTICLE VI
                          EFFECTIVE TIME OF THE MERGER

         A certificate of merger evidencing the transactions contemplated herein
shall be delivered to the New York Secretary of State and the Delaware Secretary
of State for filing as provided in the Reorganization Agreement. The Merger
shall be effective at the time and on the date specified in such certificate of
merger (such date and time being herein referred to as the "Effective Time").


                                   ARTICLE VII
                              CONDITIONS PRECEDENT

         The obligations of M&T, Merger Sub and FNB to effect the Merger as
herein provided shall be subject to satisfaction, unless duly waived, of the
conditions set forth in Article 5 of the Reorganization Agreement


                                  ARTICLE VIII
                                   TERMINATION

         Anything contained in the Plan of Merger to the contrary
notwithstanding, and notwithstanding adoption hereof by the shareholders of FNB,
this Plan of Merger may be terminated and the Merger abandoned as provided in
the Reorganization Agreement.


                                   ARTICLE IX
                                  MISCELLANEOUS

         1. This Plan of Merger may be amended or supplemented at any time prior
to the Effective Time by mutual agreement of Merger Sub, M&T and FNB. Any such
amendment or supplement must be in writing and approved by their respective
Boards of Directors and/or by officers authorized thereby and shall be subject
to the proviso in Section 6.4 of the Reorganization Agreement.


                                     - 8 -



         2. Any notice or other communication required or permitted under this
Plan of Merger shall be given, and shall be effective, in accordance with the
provisions of the Reorganization Agreement.

         3. The headings of the several Articles herein are inserted for
convenience of reference only and are not intended to be a part of or to affect
the meaning or interpretation of this Plan of Merger.

         4. This Plan of Merger shall be governed by and construed in accordance
with the laws of New York and Delaware applicable to the internal affairs of FNB
and Merger Sub.

         5. This Plan of Merger, taken together with the Reorganization
Agreement, shall constitute a plan of reorganization within the meaning of
Section 368 of the Code.


               [Remainder of this page left intentionally blank.]


                                     - 9 -



         IN WITNESS WHEREOF, the parties hereto, intending to be legally bound
hereby, have caused this Plan of Merger to be executed in counterparts by their
duly authorized officers and attested by their officers thereunto duly
authorized, all as of the day and year first above written.

Attest                                  M&T BANK CORPORATION



/s/ Marie King                          By /s/ Gary S. Paul
- ------------------------                   -------------------------------------
Marie King                                 Gary S. Paul
Corporate Secretary                        Senior Vice President



Attest                                  OLYMPIA FINANCIAL CORP.



/s/ Marie King                          By /s/ Gary S. Paul
- ------------------------                   -------------------------------------
Marie King                                 Gary S. Paul
Corporate Secretary                        Treasurer and Assistant Secretary



Attest                                  FNB ROCHESTER CORP.


/s/ Mariann Joyal                       By /s/ R. Carlos Carballada
- ------------------------                   -------------------------------------
Mariann Joyal                              R. Carlos Carballada
Secretary                                  President and Chief Executive Officer


                                     - 10 -

                                                                    Exhibit 99.2

                             STOCK OPTION AGREEMENT

                  THE TRANSFER OF THIS AGREEMENT IS SUBJECT TO
                   CERTAIN PROVISIONS CONTAINED HEREIN AND TO
                          RESALE RESTRICTIONS UNDER THE
                       SECURITIES ACT OF 1933, AS AMENDED

STOCK OPTION AGREEMENT, dated December 9, 1998, between FNB Rochester Corp., a
New York corporation ("Issuer"), and M&T Bank Corporation, a New York
corporation ("Grantee").

                              W I T N E S S E T H:

         WHEREAS, Grantee, Issuer and Olympia Financial Corp., a Delaware
corporation and a wholly owned subsidiary of Grantee ("Merger Sub") have entered
into an Agreement and Plan of Reorganization of even date herewith (the
"Reorganization Agreement"), which agreement has been executed by the parties
hereto immediately prior to this Stock Option Agreement (the "Agreement"), and
will enter into an Agreement and Plan of Merger to be dated as of the date of
this Agreement (the "Plan of Merger," and, together with the Reorganization
Agreement, the "Merger Agreements"); and

         WHEREAS, as a condition to Grantee's entering into the Merger
Agreements and in consideration therefor, Issuer has agreed to grant Grantee the
Option (as hereinafter defined);

         NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements set forth herein and in the Merger Agreements, the
parties hereto agree as follows:

                  1. (a) Issuer hereby grants to Grantee an unconditional,
irrevocable option (the "Option") to purchase, subject to the terms hereof, up
to 721,535 fully paid and nonassessable shares of Issuer's Common Stock, par
value $1.00 per share ("Common Stock"), at a price of $24.00 per share (the
"Option Price"); provided, however, that in no event shall the number of shares
of Common Stock for which this Option is exercisable exceed 19.9% of the
Issuer's issued and outstanding shares of Common Stock without giving effect to
any shares subject to or issued pursuant to the Option. The number of shares of
Common Stock that may be received upon the exercise of the Option and the Option
Price are subject to adjustment as herein set forth.

                     (b) In the event that any additional shares of Common Stock
are either (i) issued or otherwise become outstanding after the date of this
Agreement (other than pursuant to this Agreement or as permitted under the terms
of the Merger Agreements) or (ii) redeemed, repurchased, retired or otherwise
cease to be outstanding after the date of the Agreement, the number of shares of
Common Stock subject to the Option shall be increased or decreased, as
appropriate, so that, after such issuance, such number equals 19.9% of the
number of shares of Common Stock then issued and outstanding without giving
effect to any shares subject or issued pursuant to the Option. Nothing contained
in this Section 1(b) or elsewhere in this Agreement shall be deemed to authorize
Issuer or Grantee to breach any provision of the Merger Agreements.

                  2. (a) The Holder (as hereinafter defined) may exercise the
Option, in whole or part, and from time to time, if, but only if, both an
Initial Triggering Event (as hereinafter defined) and a Subsequent Triggering
Event (as hereinafter defined) shall have occurred prior to the occurrence of an
Exercise Termination Event (as hereinafter defined), provided, however, that the
Holder shall have sent the written notice of such exercise (as provided in
subsection (e) of this Section 2) within six months following such Subsequent
Triggering Event, provided further, however, that if the Option cannot be
exercised on any day because of any injunction, order or similar restraint
issued by a court of competent jurisdiction, the period during which the Option
may be exercised shall be extended so that the Option shall expire no earlier
than on the 10th business day after such injunction, order or restraint shall
have been dissolved or when such injunction, order or restraint shall have
become permanent and no longer subject to appeal, as the case may be. Each of
the following shall be an "Exercise Termination Event": (i) the Effective Time
(as defined in the Plan of Merger) of the Merger; (ii) termination of the Merger
Agreements in accordance with the provisions thereof if such termination occurs
prior to the occurrence of an Initial Triggering Event except a termination by
Grantee pursuant to Section 6.1(b)(i) of the Reorganization Agreement (unless
the breach by Issuer giving rise to such right of termination is



non-volitional); or (iii) the passage of 12 months after termination of the
Merger Agreements if such termination follows the occurrence of an Initial
Triggering Event or is a termination by Grantee pursuant to Section 6.1(b)(i) of
the Reorganization Agreement (unless the breach by Issuer giving rise to such
right of termination is non-volitional). The term "Holder" shall mean the holder
or holders of the Option. Notwithstanding anything to the contrary contained
herein, the Option may not be exercised (nor may Grantee's rights under Section
10 hereof be exercised) at any time when Grantee shall be in willful breach of
any of its covenants or agreements contained in the Merger Agreements under
circumstances that would entitle Issuer to terminate the Merger Agreements
(without regard to any grace period provided for in Section 6.1(b)(x) of the
Reorganization Agreement). In the event that Issuer terminates the Merger
Agreements pursuant to Section 6.1(f) of the Reorganization Agreement, then
immediately upon Grantee's receipt of the wire transfer contemplated by such
Section 6.1(f), this Agreement shall terminate and shall become void and have no
further force or effect and Grantee shall surrender this Agreement to Issuer.

                     (b) The term "Initial Triggering Event" shall mean any of
the following events or transactions occurring after the date hereof:

                                    (i) Issuer or any of its Subsidiaries (each
an "Issuer Subsidiary"), without having received Grantee's prior written
consent, shall have entered into an agreement to engage in an Acquisition
Transaction (as hereinafter defined) with any person (the term "person" for
purposes of this Agreement having the meaning assigned thereto in Sections
3(a)(9) and 13(d)(3) of the Securities Exchange Act of 1934, as amended (the
"1934 Act"), and the rules and regulations thereunder) other than Grantee or any
of its Subsidiaries (each a "Grantee Subsidiary") or Issuer or any of its
Subsidiaries, without having received Grantee's prior written consent, shall
have authorized, recommended, proposed, or publicly announced its intention to
authorize, recommend or propose to engage in an Acquisition Transaction with any
person other than Grantee or a Subsidiary of Grantee. For purposes of this
Agreement, "Acquisition Transaction" shall mean (w) a merger or consolidation,
or any similar transaction, involving Issuer or any Significant Subsidiary (as
defined in Rule 1-02 of Regulation S-X promulgated by the Securities and
Exchange Commission (the "SEC")) of Issuer, (x) a purchase, lease or other
acquisition or assumption of all or a substantial portion of the assets or
deposits of Issuer or any Significant Subsidiary of Issuer, (y) a purchase or


                                       2


other acquisition (including by way of merger, consolidation, share exchange or
otherwise) of securities representing 10% or more of the voting power of Issuer,
or (z) any substantially similar transaction; provided, however, that in no
event shall any merger, consolidation, purchase or similar transaction involving
only the Issuer and one or more of its Subsidiaries or involving only two or
more of such Subsidiaries, be deemed to be an Acquisition Transaction, provided
that any such transaction is not entered into in violation of the terms of the
Merger Agreements;

                                    (ii) Any person (other than Grantee or any
Subsidiary of Grantee) shall have acquired beneficial ownership or the right to
acquire beneficial ownership of 10% or more of the outstanding shares of Common
Stock (the term "beneficial ownership" for purposes of this Agreement having the
meaning assigned thereto in Section 13(d) of the 1934 Act, and the rules and
regulations thereunder) or any person other than Grantee or any Subsidiary of
Grantee shall have commenced (as such term is defined under the rules and
regulations of the SEC), or shall have filed or publicly disseminated a
registration statement or similar disclosure statement with respect to, a tender
offer or exchange offer to purchase any shares of Issuer Common Stock such that,
upon consummation of such offer, such person would own or control 10% or more of
the then outstanding shares of Issuer Common Stock (such an offer being referred
to herein as a "Tender Offer" or an "Exchange Offer," respectively);

                                    (iii) (A) the holders of Issuer Common Stock
shall not have approved the Merger Agreements and the transactions contemplated
thereby, at the meeting of such stockholders held for the purpose of voting on
such agreement, (B) such meeting shall not have been held or shall have been
cancelled prior to termination of the Merger Agreements, or (C) the Board of
Directors of Issuer shall have publicly withdrawn or modified, or publicly
announced its intent to withdraw or modify, in any manner adverse to Grantee,
its recommendation that the stockholders of Issuer approve the transactions
contemplated by the Merger Agreements, in each case after it shall have been
publicly announced that any person other than Grantee or any Subsidiary of
Grantee shall have (x) made, or disclosed an intention to make, a proposal to
engage in an Acquisition Transaction, (y) commenced a Tender Offer, or filed or
publicly disseminated a registration statement or similar disclosure statement
with respect to an Exchange Offer, or (z) filed an application (or given a
notice), whether in draft or final form, under any federal or state banking laws
seeking regulatory approval to engage in an Acquisition Transaction; or

                                    (iv) After an overture is made by a third
party to Issuer or its stockholders to engage in an Acquisition Transaction,
Issuer shall have breached any covenant or obligation contained in the
Reorganization Agreement and such breach (x) would entitle Grantee to terminate
the Merger Agreements and (y) shall not have been cured prior to the Notice Date
(as defined below).

                  (c) The term "Subsequent Triggering Event" shall mean either
of the following events or transactions occurring after the date hereof:

                             (i) The acquisition by any person of beneficial
ownership of 25% or more of the then outstanding shares of Common Stock; or

                                       3


                             (ii) The occurrence of the Initial Triggering Event
described in paragraph (i) of subsection (b) of this Section 2, except that the
percentage referred to in clause (y) shall be 25%.

                  (d) Issuer shall notify Grantee promptly in writing of the
occurrence of any Initial Triggering Event or Subsequent Triggering Event of
which it has notice (together, a "Triggering Event"), it being understood that
the giving of such notice by Issuer shall not be a condition to the right of the
Holder to exercise the Option.

                  (e) In the event the Holder is entitled to and wishes to
exercise the Option, it shall send to Issuer a written notice (the date of which
being herein referred to as the "Notice Date") specifying (i) the total number
of shares it will purchase pursuant to such exercise and (ii) a place and date
not earlier than three business days nor later than 60 business days from the
Notice Date for the closing of such purchase (the "Closing Date"); provided that
if prior notification to or approval of the Federal Reserve Board or any other
regulatory agency is required in connection with such purchase, the Holder shall
promptly file the required notice or application for approval and shall
expeditiously process the same and the period of time that otherwise would run
pursuant to this sentence shall run instead from the date on which any required
notification periods have expired or been terminated or such approvals have been
obtained and any requisite waiting period or periods shall have passed. Any
exercise of the Option shall be deemed to occur on the Notice Date relating
thereto.

                  (f) At the closing referred to in subsection (e) of this
Section 2, the Holder shall pay to Issuer the aggregate purchase price for the
shares of Common Stock purchased pursuant to the exercise of the Option in
immediately available funds by wire transfer to a bank account designated by
Issuer, provided that failure or refusal of Issuer to designate such a bank
account shall not preclude the Holder from exercising the Option.

                  (g) At such closing, simultaneously with the delivery of
immediately available funds as provided in subsection (f) of this Section 2,
Issuer shall deliver to the Holder a certificate or certificates representing
the number of shares of Common Stock purchased by the Holder and, if the Option
should be exercised in part only, a new Option evidencing the rights of the
Holder thereof to purchase the balance of the shares purchasable hereunder, and
the Holder shall deliver to Issuer a copy of this Agreement and a letter
agreeing that the Holder will not offer to sell or otherwise dispose of such
shares in violation of applicable law or the provisions of this Agreement.

                  (h) Certificates for Common Stock delivered at a closing
hereunder may be endorsed with a restrictive legend that shall read
substantially as follows:

                  "The transfer of the shares represented by this certificate is
                  subject to certain provisions of an agreement between the
                  registered holder hereof and Issuer and to resale restrictions
                  arising under the Securities Act of 1933, as amended. A copy
                  of such agreement is on file at the principal office of Issuer
                  and will be provided to the holder hereof without charge upon
                  receipt by Issuer of a written request therefor."

It is understood and agreed that: (i) the reference to the resale restrictions
of the Securities Act of 1933, as amended (the "1933 Act"), in the above legend


                                       4


shall be removed by delivery of substitute certificate(s) without such reference
if the Holder shall have delivered to Issuer a copy of a letter from the staff
of the SEC, or an opinion of counsel, in form and substance reasonably
satisfactory to Issuer, to the effect that such legend is not required for
purposes of the 1933 Act; (ii) the reference to the provisions to this Agreement
in the above legend shall be removed by delivery of substitute certificate(s)
without such reference if the shares have been sold or transferred in compliance
with the provisions of this Agreement and under circumstances that do not
require the retention of such reference; and (iii) the legend shall be removed
in its entirety if the conditions in the preceding clauses (i) and (ii) are both
satisfied. In addition, such certificates shall bear any other legend as may be
required by law.

                  (i) Upon the giving by the Holder to Issuer of the written
notice of exercise of the Option provided for under subsection (e) of this
Section 2 and the tender of the applicable purchase price in immediately
available funds, the Holder shall be deemed to be the holder of record of the
shares of Common Stock issuable upon such exercise, notwithstanding that the
stock transfer books of Issuer shall then be closed or that certificates
representing such shares of Common Stock shall not then be actually delivered to
the Holder. Issuer shall pay all expenses, and any and all United States
federal, state and local taxes and other charges that may be payable in
connection with the preparation, issue and delivery of stock certificates under
this Section 2 in the name of the Holder or its assignee, transferee or
designee.

                  3. Issuer agrees: (i) that it shall at all times maintain,
free from preemptive rights, sufficient authorized but unissued or treasury
shares of Common Stock so that the Option may be exercised without additional
authorization of Common Stock after giving effect to all other options,
warrants, convertible securities and other rights to purchase Common Stock; (ii)
that it will not, by charter amendment or through reorganization, consolidation,
merger, dissolution or sale of assets, or by any other voluntary act, avoid or
seek to avoid the observance or performance of any of the covenants,
stipulations or conditions to be observed or performed hereunder by Issuer;
(iii) promptly to take all action as may from time to time be required
(including (x) complying with all premerger notification, reporting and waiting
period requirements specified in 15 U.S.C. ss. 18a and regulations promulgated
thereunder and (y) in the event, under federal or state banking law, prior
approval of or notice to the Federal Reserve Board or any other federal or state
regulatory authority is necessary before the Option may be exercised,
cooperating fully with the Holder in preparing such applications or notices and
providing such information to the Federal Reserve Board or such other federal or
state regulatory authority as they may require) in order to permit the Holder to
exercise the Option and Issuer duly and effectively to issue shares of Common
Stock pursuant hereto; and (iv) promptly to take all action provided herein to
protect the rights of the Holder against dilution.

                  4. This Agreement (and the Option granted hereby) are
exchangeable, without expense, at the option of the Holder, upon presentation
and surrender of this Agreement at the principal office of Issuer, for other
Agreements providing for Options of different denominations entitling the holder
thereof to purchase, on the same terms and subject to the same conditions as are
set forth herein, in the aggregate the same number of shares of Common Stock
purchasable hereunder. The terms "Agreement" and "Option" as used herein include
any Stock Option Agreements and related Options for which this Agreement (and
the Option granted hereby) may be exchanged. Upon receipt by Issuer of evidence


                                       5


reasonably satisfactory to it of the loss, theft, destruction or mutilation of
this Agreement, and (in the case of loss, theft or destruction) of reasonably
satisfactory indemnification, and upon surrender and cancellation of this
Agreement, if mutilated, Issuer will execute and deliver a new Agreement of like
tenor and date. Any such new Agreement executed and delivered shall constitute
an additional contractual obligation on the part of Issuer, whether or not the
Agreement so lost, stolen, destroyed or mutilated shall at any time be
enforceable by anyone.

                  5. In addition to the adjustment in the number of shares of
Common Stock that are purchasable upon exercise of the Option pursuant to
Section 1 of this Agreement, the number of shares of Common Stock purchasable
upon the exercise of the Option and the Option Price shall be subject to
adjustment from time to time as provided in this Section 5. In the event of any
change in, or distributions in respect of, the Common Stock by reason of stock
dividends, split-ups, mergers, recapitalizations, combinations, subdivisions,
conversions, exchanges of shares, distributions on or in respect of the Common
Stock that would be prohibited under the terms of the Merger Agreement, or the
like, the type and number of shares of Common Stock purchasable upon exercise
hereof and the Option Price shall be appropriately adjusted in such manner as
shall fully preserve the economic benefits provided hereunder and proper
provision shall be made in any agreement governing any such transaction to
provide for such proper adjustment and the full satisfaction of the Issuer's
obligations hereunder.

                  6. Upon the occurrence of a Subsequent Triggering Event that
occurs prior to an Exercise Termination Event, Issuer shall, at the request of
Grantee delivered within six months of such Subsequent Triggering Event (whether
on its own behalf or on behalf of any subsequent holder of this Option (or part
thereof) or any of the shares of Common Stock issued pursuant hereto), promptly
prepare, file and keep current a registration statement under the 1933 Act
covering this Option and any shares issued and issuable pursuant to this Option
and shall use its reasonable best efforts to cause such registration statement
to become effective and remain current in order to permit the sale or other
disposition of this Option and any shares of Common Stock issued upon total or
partial exercise of this Option ("Option Shares") in accordance with any plan of
disposition requested by Grantee. Issuer will use its reasonable best efforts to
cause such registration statement first to become effective and then to remain
effective for such period not in excess of 180 days from the day such
registration statement first becomes effective or such shorter time as may be
reasonably necessary to effect such sales or other dispositions. Grantee shall
have the right to demand two such registrations. The foregoing notwithstanding,
if, at the time of any request by Grantee for registration of the Option or
Option Shares as provided above, Issuer is in registration with respect to an
underwritten public offering of shares of Common Stock, and if in the good faith
judgment of the managing underwriter or managing underwriters, or, if none, the
sole underwriter or underwriters, of such offering the inclusion of the Holder's
Option or Option Shares would interfere with the successful marketing of the
shares of Common Stock offered by Issuer, the number of Option Shares otherwise
to be covered in the registration statement contemplated hereby may be reduced;
and provided, however, that after any such required reduction the number of
Option Shares to be included in such offering for the account of the Holder
shall constitute at least 25% of the total number of shares to be sold by the
Holder and Issuer in the aggregate; and provided further, however, that if such
reduction occurs, then the Issuer shall file a registration statement for the


                                       6


balance as promptly as practicable and no reduction shall thereafter occur. Each
such Holder shall provide all information reasonably requested by Issuer for
inclusion in any registration statement to be filed hereunder. If requested by
any such Holder in connection with such registration, Issuer shall become a
party to any underwriting agreement relating to the sale of such shares, but
only to the extent of obligating itself in respect of representations,
warranties, indemnities and other agreements customarily included in secondary
offering underwriting agreements for the Issuer. Upon receiving any request
under this Section 6 from any Holder, Issuer agrees to send a copy thereof to
any other person known to Issuer to be entitled to registration rights under
this Section 6, in each case by promptly mailing the same, postage prepaid, to
the address of record of the persons entitled to receive such copies.
Notwithstanding anything to the contrary contained herein, in no event shall
Issuer be obligated to effect more than two registrations pursuant to this
Section 6 by reason of the fact that there shall be more than one Grantee as a
result of any assignment or division of this Agreement.

                  7. The periods for exercise of certain rights under Sections
2, 6, 10 and 12 shall be extended: (i) to the extent necessary to obtain all
regulatory approvals for the exercise of such rights, and for the expiration of
all statutory waiting periods; and (ii) to the extent necessary to avoid
liability under Section 16(b) of the 1934 Act by reason of such exercise.

                  8. Issuer hereby represents and warrants to Grantee as
follows:

                  (a) Issuer has full corporate power and authority to execute
and deliver this Agreement and to consummate the transactions contemplated
hereby. The execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby have been duly and validly authorized by the
Board of Directors of Issuer and no other corporate proceedings on the part of
Issuer are necessary to authorize this Agreement or to consummate the
transactions so contemplated. This Agreement has been duly and validly executed
and delivered by Issuer.

                  (b) Issuer has taken all necessary corporate action to
authorize and reserve and to permit it to issue, and at all times from the date
hereof through the termination of this Agreement in accordance with its terms
will have reserved for issuance upon the exercise of the Option, that number of
shares of Common Stock equal to the maximum number of shares of Common Stock at
any time and from time to time issuable hereunder, and all such shares, upon
issuance pursuant hereto, will be duly authorized, validly issued, fully paid,
nonassessable, and will be delivered free and clear of all claims, liens,
encumbrance and security interests and not subject to any preemptive rights.

                  9. Grantee hereby represents and warrants to Issuer that:

                  (a) Grantee has all requisite corporate power and authority to
enter into this Agreement and, subject to any approvals or consents referred to
herein, to consummate the transactions contemplated hereby. The execution and
delivery of this Agreement and the consummation of the transactions contemplated
hereby have been duly authorized by all necessary corporate action on the part
of Grantee. This Agreement has been duly executed and delivered by Grantee.

                  (b) The Option is not being, and any shares of Common Stock or
other securities acquired by Grantee upon exercise of the Option will not be,
acquired with a view to the public distribution thereof and will not be


                                       7


transferred or otherwise disposed of except in a transaction registered or
exempt from registration under the Securities Act.

                  10. Neither of the parties hereto may assign any of its rights
or obligations under this Agreement or the Option created hereunder to any other
person, without the express written consent of the other party, except that in
the event a Subsequent Triggering Event shall have occurred prior to an Exercise
Termination Event, Grantee, subject to the express provisions hereof, may assign
in whole or in part its rights and obligations hereunder within six months
following such Subsequent Triggering Event (or such later period as provided in
Section 7); provided, however, that until the date 15 days following the date on
which the Federal Reserve Board approves an application by Grantee to acquire
the shares of Common Stock subject to the Option (proof of which approval shall
be furnished promptly to Issuer), Grantee may not assign its rights under the
Option except in (i) a widely dispersed public distribution, (ii) a private
placement in which no one party acquires the right to purchase in excess of 2%
of the voting shares of Issuer, (iii) an assignment to a single party (e.g., a
broker or investment banker) for the purpose of conducting a widely dispersed
public distribution on Grantee's behalf, or (iv) any other manner approved by
the Federal Reserve Board.

                  11. Each of Grantee and Issuer will use its best efforts to
make all filings with, and to obtain consents of, all third parties and
governmental authorities necessary to the consummation of the transactions
contemplated by this Agreement, including without limitation making application
to list the shares of Common Stock issuable hereunder on the Nasdaq National
Market upon official notice of issuance and applying to the Federal Reserve
Board, for approval to acquire the shares issuable hereunder, but Grantee shall
not be obligated to apply to state banking authorities for approval to acquire
the shares of Common Stock issuable hereunder until such time, if ever, as it
deems appropriate to do so.

                  12. (a) Upon the occurrence of a Subsequent Triggering Event
that occurs prior to an Exercise Termination Event, (i) at the request of any
Holder, delivered within thirty (30) days following such occurrence (or such
later period as provided in Section 7), Issuer shall repurchase the Option from
the Holder at a price (the "Option Repurchase Price") equal to the amount by
which (A) the market/offer price (as defined below) exceeds (B) the Option
Price, multiplied by the number of shares for which this Option may then be
exercised, plus, to the extent not previously reimbursed, Grantee's reasonable
out-of-pocket expenses incurred in connection with the transactions contemplated
by, and the enforcement of Grantee's rights under, the Merger Agreements,
including without limitation legal, accounting and investment banking fees (the
"Grantee's Out-of-Pocket Expenses"), and (ii) at the request of any owner of
Option Shares from time to time (the "Owner"), delivered within thirty (30) days
following such occurrence (or such later period as provided in Section 7),
Issuer shall repurchase such number of the Option Shares from such Owner as the
Owner shall designate at a price per share ("Option Share Repurchase Price")
equal to the greater of (A) the market/offer price and (B) the average option
price per share paid by the Owner for the Option Shares so designated, plus, to
the extent not previously reimbursed, Grantee's Out-of-Pocket Expenses. The term
"market/offer price" shall mean the highest of (w) the price per share of the
Common Stock at which a tender offer or exchange offer therefor has been made,
(x) the price per share of the Common Stock to be paid by any Person, other than
Grantee or a subsidiary of Grantee, pursuant to an agreement with Issuer, (y)


                                       8


the highest closing price for shares of Common Stock within the six (6) month
period immediately preceding the required repurchase of Options or Option
Shares, as the case may be, or (z) in the event of a sale of all or
substantially all of Issuer's assets, the sum of the price paid in such sale for
such assets and the current market value of the remaining assets of Issuer as
determined by a nationally recognized investment banking firm selected by a
majority in the interest of the Holders or the Owners, as the case may be, and
reasonably acceptable to Issuer, divided by the number of shares of Common Stock
of Issuer outstanding at the time of such sale. In determining the market/offer
price, the value of consideration other than cash shall be determined by a
nationally recognized investment banking firm selected by a majority in interest
of the Holders or the Owners, as the case may be, and reasonably acceptable to
Issuer.

                  (b) Each Holder and Owner, as the case may be, may exercise
its right to require Issuer to repurchase the Option and any Option Shares
pursuant to this Section 12 by surrendering for such purpose to Issuer, at its
principal office, a copy of this Agreement or certificates for Option Shares, as
applicable, accompanied by a written notice or notices stating that such Holder
or Owner elects to require Issuer to repurchase this Option and/or Option Shares
in accordance with the provisions of this Section 12. As promptly as
practicable, and in any event within ten (10) business days after the surrender
of the Option and/or certificates representing Option Shares and the receipt of
such notice or notices relating thereto, Issuer shall deliver or cause to be
delivered to each Holder the Option Repurchase Price and/or to each Owner the
Option Share Repurchase Price therefor or the portion thereof that Issuer is not
then prohibited under applicable law and regulation from so delivering.

                  (c) To the extent that Issuer is prohibited under applicable
law or regulation, or as a consequence of administrative policy, or as a result
of a written agreement or other binding obligation with a governmental or
regulatory body or agency, from repurchasing the Option and/or the Option Shares
in full, Issuer shall immediately so notify each Holder and/or each Owner and
thereafter deliver or cause to be delivered, from time to time, to such Holder
and/or Owner, as appropriate, the portion of the Option Repurchase Price and the
Option Share Repurchase Price, respectively, that it is no longer prohibited
from delivering, within ten (10) business days after the date on which Issuer is
no longer so prohibited; provided, however, that if Issuer at any time after
delivery of a notice of repurchase pursuant to paragraph (b) of this Section 12
is prohibited under applicable law or regulation, or as a consequence of
administrative policy, from delivering to any Holder and/or Owner, as
appropriate, the Option Repurchase Price and the Option Share Repurchase Price,
respectively, in part or in full (and Issuer hereby undertakes to use its best
efforts to receive any required regulatory and legal approvals and to file any
required notices as promptly as practicable in order to accomplish such


                                       9


repurchase), such Holder or Owner may revoke its notice of repurchase of the
Option or the Option Shares either in whole or to the extent of the prohibition,
whereupon Issuer shall promptly (i) deliver to such Holder and/or Owner, as
appropriate, that portion of the Option Purchase Price or the Option Share
Repurchase Price that Issuer is not prohibited from delivering; and (ii)
deliver, as appropriate, either (A) to such Holder, a new Stock Option Agreement
evidencing the right of such Holder to purchase that number of shares of Common
Stock obtained by multiplying the number of shares of Common Stock for which the
surrendered Stock Option Agreement was exercisable at the time of delivery of
the notice of repurchase by a fraction, the numerator of which is the Option
Repurchase Price less the portion thereof theretofore delivered to the Holder
and the denominator of which is the Option Repurchase Price, or (B) to such
Owner, a certificate for the Option Shares it is then so prohibited from
repurchasing.

                  13. The parties hereto acknowledge that damages would be an
inadequate remedy for a breach of this Agreement by either party hereto and that
the obligations of the parties hereto shall be enforceable by either party
hereto through injunctive or other equitable relief.

                  14. If any term, provision, covenant or restriction contained
in this Agreement is held by a court or a federal or state regulatory agency of
competent jurisdiction to be invalid, void or unenforceable, the remainder of
the terms, provisions and covenants and restrictions contained in this Agreement
shall remain in full force and effect, and shall in no way be affected, impaired
or invalidated. If for any reason such court or regulatory agency determines
that the Holder is not permitted to acquire the full number of shares of Common
Stock provided in Section 1(a) hereof (as adjusted pursuant to Section 1(b) or 5
hereof), it is the express intention of Issuer to allow the Holder to acquire
such lesser number of shares as may be permissible, without any amendment or
modification hereof.

                  15. All notices, requests, claims, demands and other
communications hereunder shall be deemed to have been duly given when delivered
in person, by cable, telegram, telecopy or telex, or by registered or certified
mail (postage prepaid, return receipt requested) at the respective addresses of
the parties set forth in the Reorganization Agreement.

                  16. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

                  17. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of which
shall constitute one and the same agreement.

                  18. Except as otherwise expressly provided herein, each of the
parties hereto shall bear and pay all costs and expenses incurred by it or on
its behalf in connection with the transactions contemplated hereunder, including
fees and expenses of its own financial consultants, investment bankers,
accountants and counsel.

                  19. Except as otherwise expressly provided herein or in the
Merger Agreements, this Agreement contains the entire agreement between the
parties with respect to the transactions contemplated hereunder and supersedes
all prior arrangements or understandings with respect thereof, written or oral.
The terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the parties hereto and their respective successors and permitted
assigns. Nothing in this Agreement, expressed or implied, is intended to confer
upon any party, other than the parties hereto, and their respective successors
and permitted assigns, any rights, remedies, obligations or liabilities under or
by reason of this Agreement, except as expressly provided herein.

                  20. Capitalized terms used in this Agreement and not defined
herein shall have the meanings assigned thereto in the Merger Agreement.

                                       10



                  IN WITNESS WHEREOF, each of the parties has caused this
Agreement to be executed on its behalf by its officers thereunto duly
authorized, all as of the date first above written.


FNB Rochester Corp.


By: /s/ R. Carlos Carballada
    ----------------------------
    R. Carlos Carballada
    President and CEO



M&T Bank Corporation



By: /s/ Gary S. Paul               
    ----------------------------
    Gary S. Paul
    Senior Vice President



                                                                    Exhibit 99.3


                            FORM OF VOTING AGREEMENT


                                December 9, 1998



M&T Bank Corporation
One M&T Plaza
Buffalo, New York  14229

Ladies and Gentlemen:

         The undersigned is a director of FNB Rochester Corp. ("FNB") and is the
beneficial holder of shares of common stock, par value $1.00 per share, of FNB
("FNB Common Stock").

         FNB and M&T Bank Corporation ("M&T") are considering the adoption
and/or execution of an Agreement and Plan of Reorganization (the "Reorganization
Agreement") and an Agreement and Plan of Merger (together with the
Reorganization Agreement, the "Plan of Merger"), providing for certain
transactions pursuant to which FNB would be merged with and into Olympia
Financial Corp. (the "Merger"). The execution of the Plan of Merger is subject
in the case of M&T to the execution and delivery of this letter agreement (this
"Agreement"). In consideration of the substantial expenses that M&T will incur
in connection with the Merger and in order to induce M&T to execute the Plan of
Merger and to proceed to incur such expenses, the undersigned agrees and
undertakes, in his capacity as a shareholder of FNB and not in his capacity as a
director of FNB, as follows:

         1. The undersigned will vote or cause to be voted for approval and
adoption of the Plan of Merger all the shares of FNB Common Stock the
undersigned is entitled to vote with respect thereto.

         2. The undersigned will not effect any transfer or other disposition
(except by operation of law) of any of the undersigned's shares of FNB Common
Stock until FNB's shareholders have voted to approve and adopt the Plan of
Merger or until the Plan of Merger has been terminated pursuant to the terms of
the Reorganization Agreement, except for any transfer mandated by law or court
order. In the case of any transfer by operation of law or otherwise, this
Agreement shall be binding upon and inure to the benefit of the transferee to
the extent permitted by law. Any transfer or other disposition in violation of
the terms of this paragraph 2 shall be null and void.

         3. In the capacity described in this Agreement, the undersigned shall
take or cause to be taken all action necessary or desirable on the undersigned's
part so as to permit consummation of the Merger at the earliest possible date
and shall not take, or cause or to the best of the undersigned's ability permit
to be taken, any action which would substantially impair the prospects of
completing the Merger pursuant to the Plan of Merger.

         4. The undersigned acknowledges and agrees that any remedy at law for
breach of the foregoing provisions shall be inadequate and that, in addition to
any other relief which may be available, M&T shall be entitled to temporary and
permanent injunctive relief without the necessity of proving actual damages.

         IN WITNESS WHEREOF, the undersigned has executed this Agreement as of
the date first above written.

                                            Very truly yours,




                                            ------------------------------


Accepted and agreed to as of
the date first above written:

M&T Bank Corporation



By:
   ------------------------

                                                                    Exhibit 99.4

Contact: M&T Bank Corporation                        For Immediate Release
         Gary S. Paul                                December 9, 1998
         (716) 842-5130

         FNB Rochester Corp.
         Peter M. Biggs
         (716) 258-8748



            FNB ROCHESTER CORP., M&T BANK CORPORATION ANNOUNCE MERGER

ROCHESTER AND BUFFALO, NEW YORK, (December 9, 1998) -- FNB Rochester Corp.
("FNB") (NASDAQ:FNBR), Rochester, New York, and M&T Bank Corporation (" M&T")
(NYSE:MTB), Buffalo, New York, today jointly announced that they have entered
into a definitive agreement for a merger between the two companies.

R. Carlos Carballada, President and Chief Executive Officer of FNB said, "M&T
has the unique capacity to bring our customers the strength and services of a
large regional institution, while maintaining the local feel and decision-making
ability of an upstate New York headquartered bank. I am confident that M&T will
continue FNB's tradition of excellent customer service and community
leadership."

Robert G. Wilmers, President and Chief Executive Officer of M&T, said, "M&T is
very committed to the Rochester market, as this merger once again shows. In less
than a decade, we have gone from no presence in the market to being the premier
banker to area businesses. This merger also expands our branch network and
deposit position to a leading position in the Rochester market."

Following the merger, Mr. Carballada and FNB Chairman Michael J. Falcone will be
elected to the boards of directors of M&T and M&T Bank.

Under the terms of the merger agreement stockholders of FNB may elect to receive
 .06766 of a share of M&T common stock or $33.00 in cash for each outstanding
share of FNB common stock. In the aggregate, 50% of the 3,625,806 shares
currently outstanding will be exchanged for M&T stock and the remaining shares
will be converted for cash. The selections of FNB's stockholders will be subject
to allocation and proration if either portion of the merger consideration is
oversubscribed. Adjustments to the number of shares converted to stock and cash
may be made under certain circumstances.



                                     -more-








FNB, M&T to Merge  2-2-2

The merger has an indicated value of approximately $129 million. On the same
basis, the proforma market capitalization of M&T would be approximately $3.7
billion following the merger. The combined institution would rank 36th among
independent U.S. banking companies as of September 30, 1998, with $20 billion in
total assets, on a proforma basis.

FNB also granted M&T an option to acquire up to 19.9% percent of the shares of
common stock of FNB under certain circumstances. The transaction has been
approved by the board of directors of each company, and is subject to certain
conditions, including regulatory approvals and approval of FNB's stockholders.
It is anticipated that the merger will be completed in early 1999.

Separately, the M&T Charitable Foundation announced that, consistent with its
policy of supporting communities in which M&T conducts business, it intends to
earmark $10 million of its assets to support charitable activities in the
Rochester area. Mr. Carballada will serve as the chairman of the `Rochester
Fund' of the M&T Charitable Foundation, which will administer these funds
following the merger.

FNB Rochester Corp., with $568 million in assets as of September 30, 1998, is
the parent company of First National Bank of Rochester, which has 19 offices in
western and central New York State.

M&T Bank Corporation had $19.5 billion in assets as of September 30, 1998. It is
the parent company of M&T Bank, which has 247 branch offices throughout New York
State and in northeastern Pennsylvania.