EXHIBIT 4.l
                                                                -----------


                    AMENDMENT NO. 1 TO RIGHTS AGREEMENT, dated as of March
          1, 2001, between FIRST NATIONAL BANCORP, INC., an Illinois
          corporation (the "Company"), and  HARRIS TRUST AND SAVINGS BANK
          (the "Rights Agent"), amending the Rights Agreement, dated as of
          November 14, 1996 between the Company and the Rights Agent (the
          "Rights Agreement").

                                 W I T N E S S E T H
                                 - - - - - - - - - -

                    WHEREAS, the Board of Directors of the Company has
          approved an Agreement and Plan of Merger (the "Merger Agreement")
          by and among the Company, Bank of Montreal, a chartered bank of
          Canada ("BMO"), and Bankmont Financial Corp., ("BFC"), a Delaware
          corporation and a wholly owned subsidiary of BMO, providing for
          the affiliation of the Company with BMO through the merger of the
          Company with and into BFC (the "Merger");

                    WHEREAS, the Board of Directors of the Company has
          determined that the Merger is fair to and in the best interests
          of the Company and its stockholders;

                    WHEREAS, the willingness of BMO and BFC to enter into
          the Merger Agreement is conditioned on, among other things, the
          amendment of the Rights Agreement on the terms set forth herein;

                    WHEREAS, Section 27 of the Rights Agreement provides
          that, among other things, the Company may, and the Rights Agent
          shall if the Company so directs, supplement or amend any
          provision of the Rights Agreement without the approval of any
          holders of the Rights; and

                    WHEREAS, the Board of Directors of the Company has
          approved an amendment to the Rights Agreement in the form hereof
          on February 23, 2001;

                    NOW, THEREFORE, in consideration of the premises and
          mutual agreements set forth in the Rights Agreement and this
          Amendment, the parties hereby agree as follows:

                    1.   Section 1 of the Rights Agreement is hereby
          amended by adding the following definitions thereto:

                    "BFC" shall mean Bankmont Financial Corp., a
               Delaware corporation and a wholly owned subsidiary of
               BMO.

          "Merger" shall mean the merger of the Company with and into BFC
          as contemplated by the Merger Agreement.





                    "Merger Agreement" shall mean the Agreement and
               Plan of Merger, dated as of March 1, 2001, by and among
               BMO, BFC and the Company, as the same may be amended in
               accordance with the terms thereof.

                    "Option" shall mean the stock option granted to
               BMO by the Company pursuant to the Share Option
               Agreement.

                    "Share Option Agreement" shall mean the Share
               Option Agreement, dated as of March 1, 2001, by and
               between BMO and the Company, as the same may be amended
               in accordance with the terms thereof.

                    "BMO" shall mean Bank of Montreal, a chartered
               bank of Canada.

                    "Voting Agreement" shall mean the Voting Agreement
               dated as of March 1, 2001, by and between BMO, on the
               one hand, and certain of the Company's shareholders on
               the other, as the same may be amended by the terms
               thereof.

          The subsections of Section 1 of the Rights Agreement shall be
          relettered to take into account and properly reference in
          alphabetical order the additions set forth above.

                    2.   Section 1(a) of the Rights Agreement (before the
          relettering contemplated by this Amendment) is hereby amended by
          adding to the end thereof the following:

                    "Notwithstanding anything to the contrary
               contained herein, neither BMO nor BFC shall be or
               become an "Acquiring Person" (and no Stock Acquisition
               Date shall occur) as a result of (i) the announcement
               of the Merger or grant of the Option, or (ii) the
               execution of the Merger Agreement, the Share Option
               Agreement or the Voting Agreement (or any amendments
               thereto in accordance with the terms thereof) or the
               grant or exercise of the Option or the consummation of
               the transactions contemplated by the Share Option
               Agreement, the Merger Agreement (including, without
               limitation, the Merger) or the Voting Agreement."

                    3.   Section 3(a) of the Rights Agreement is hereby
          amended by adding to the end thereof the following:

                    "Notwithstanding anything to the contrary
               contained herein, no Distribution Date shall occur as a
               result of (i) the announcement of the Merger or grant
               of the Option, or (ii) the execution of the Merger
               Agreement, the Share Option Agreement or the Voting
               Agreement (or any amendments thereto in accordance with
               the terms thereof) or the grant or exercise of the





               Option or the consummation of the transactions
               contemplated by the Share Option Agreement, the Merger
               Agreement (including, without limitation, the Merger)
               or the Voting Agreement, and no Distribution Date will,
               in any event, occur prior to the earlier of the
               Effective Time (as defined in the Merger Agreement) or
               the termination of the Merger Agreement."

                    4.   Section 7(a) of the Rights Agreement is hereby
          amended in its entirety to read as follows:

                    "Except as otherwise provided herein, the Rights
               shall become exercisable on the Distribution Date, and
               thereafter the registered holder of any Right
               Certificate may, subject to Section 11(a)(ii) hereof
               and except as otherwise provided herein, exercise the
               Rights evidenced thereby in whole or in part upon
               surrender of the Right Certificate, with the form of
               election to purchase on the reverse side thereof duly
               executed, to the Rights Agent at the office or agency
               of the Rights Agent designated for such purpose,
               together with payment of the aggregate Purchase Price
               with respect to the total number of one one-thousandths
               of a share of Preferred Stock (or other securities,
               cash or other assets, as the case may be) as to which
               the rights are exercised, at any time which is both
               after the Distribution Date and prior to the time (the
               "Expiration Date") that is the earliest of (i) the
               Close of Business on November 14, 2006 (the "Final
               Expiration Date"), (ii) the time at which the Rights
               are redeemed as provided in Section 23 hereof (the
               "Redemption Date"), (iii) immediately prior to the
               Effective Time (as defined in the Merger Agreement)
               (the earliest of such herein referred to as the
               "Expiration Date") or (iv) the time at which such
               Rights are exchanged as provided in Section 24 hereof."

                    5.   Section 11 of the Rights Agreement is hereby
          amended by adding to the end thereof the following:

                    "(p) Notwithstanding anything to the contrary
               contained herein, the provisions of this Section 11
               will not apply to or be triggered by (i) the
               announcement of the Merger or grant of the Option, or
               (ii) the execution of the Merger Agreement, the Share
               Option Agreement or the Voting Agreement (or any
               amendments thereto in accordance with the terms
               thereof) or the grant or exercise of the Option in
               accordance with its terms or the consummation of the
               transactions contemplated by the Share Option
               Agreement, the Merger Agreement (including, without
               limitation, the Merger) or the Voting Agreement."





                    6.   Section 13 of the Rights Agreement is hereby
          amended by adding to the end thereof the following:

                    "(f) Notwithstanding anything to the contrary
               contained herein, the provisions of this Section 13
               will not apply to or be triggered by the execution of
               the Merger Agreement, Share Option Agreement or the
               Voting Agreement (or any amendments thereto in
               accordance with the terms thereof) or the grant or
               exercise of the Option or the consummation of the
               transactions contemplated by the Share Option
               Agreement, the Merger Agreement (including, without
               limitation, the Merger) or the Voting Agreement."

                    7.   The Rights Agent shall not be liable for or by
          reason of any of the statements of fact or recitals contained in
          this Amendment No. 1.

                    8.   The term "Agreement" as used in the Rights
          Agreement shall be deemed to refer to the Rights Agreement as
          amended by this Amendment No. 1.

                    9.   Except as set forth herein, the Rights Agreement
          shall remain in full force and effect and shall be otherwise
          unaffected hereby.

                    10.  This Amendment No. 1 shall be effective as of, and
          immediately prior to, the execution and delivery of the Merger
          Agreement.

                    11.  This Amendment No.1 shall be deemed to be a
          contract made under the laws of the  State of Illinois and for
          all purposes will be governed by and construed in accordance with
          the laws of such State applicable to contracts to be made and
          performed entirely within such State.

                    12.  Exhibits B and C to the Rights Agreement shall be
          deemed amended in a manner consistent with this Amendment No. 1.

                    13.  This Amendment No. 1 may be executed in two or
          more counterparts, each of which shall be deemed an original, but
          all of which together shall constitute one and the same
          instrument.

                                         ***





                    IN WITNESS WHEREOF, the parties hereto have caused this
          Amendment No. 1 to be duly executed, all as of the day and year
          first above written.


                                        FIRST NATIONAL BANCORP, INC.


                                        By   /s/ Albert G. D'Ottavio
                                             -----------------------------

                                        Its  President and Chief Operating
                                               Officer

                                        HARRIS TRUST AND SAVINGS BANK,
                                        as Rights Agent


                                        By   /s/ Elliot Little
                                             -----------------------------
                                             Its Vice President