MOUNT VERNON SECURITIES LENDING TRUST

                         AMENDMENT TO CUSTODY AGREEMENT
                          DATED AS OF FEBRUARY 19, 2009

     WHEREAS, Mount Vernon Securities Lending Trust (formerly, USBAM Securities
Lending Trust), a Delaware trust (the "Trust"), and U.S. Bank National
Association, a national banking association organized and existing under the
laws of the United States of America (the "Custodian"), previously entered into
a Custody Agreement dated September 21, 2005 (the "Custody Agreement"); and

     WHEREAS, the second paragraph of Article 9 of the Custody Agreement
contemplates that the Custodian will invest cash balances held in the Custody
Account daily in certain temporary investment vehicles pursuant to procedures
adopted by the Custodian and approved by the Trust's administrator (the "Sweep
Procedures"), and that the Custodian will be liable to the Trust for interest
for failure to invest cash balances as required by the Sweep Procedures, such
interest to be calculated as described in the Custody Agreement and the Sweep
Procedures; and

     WHEREAS, the Trust and the Custodian wish to amend the Custody Agreement to
reflect that all cash balances will be deposited by the Custodian daily in a
non-interest bearing deposit transaction account, where such deposit transaction
account will qualify for insurance coverage under the Federal Deposit Insurance
Corporation's Temporary Liquidity Guarantee Program for as long as such program
remains in effect.

     NOW, THEREFORE, the Trust and the Custodian agree as follows:

     1. The second paragraph under Article 9 of the Custody Agreement is hereby
     replaced in its entirety by the following:

          Cash balances held in the Custodian Account shall be deposited by the
          Custodian daily in a non-interest bearing deposit transaction account
          (the "Deposit Account"). The Deposit Account shall qualify for
          insurance coverage under the Federal Deposit Insurance Corporation's
          Temporary Liquidity Guarantee Program, at no cost to the Trust, for as
          long as such program remains in effect.

     2. The Sweep Procedures no longer apply to the Trust.

     IN WITNESS WHEREOF, the Trust and the Custodian have caused this instrument
to be executed in duplicate as of the date first above written by their duly
authorized officers.

                                        MOUNT VERNON SECURITIES LENDING TRUST


                                        /s/ Joseph M. Ulrey III
                                        ----------------------------------------
                                        By: Joseph M. Ulrey III
                                        Its: Senior Managing Director


                                        U.S. BANK NATIONAL ASSOCIATION


                                        /s/ Joe D. Redwine
                                        ----------------------------------------
                                        By: Joe D. Redwine
                                        Its: Senior Vice President