EXHIBIT 22(d)(xvi)(b)

                                 AMENDMENT NO. 1
                                       TO
                             SUB-ADVISORY AGREEMENT
                                      AMONG
                             WT INVESTMENT TRUST I,
                      RODNEY SQUARE MANAGEMENT CORPORATION
                                       AND
                       PARAMETRIC PORTFOLIO ASSOCIATES LLC

            This Amendment No. 1 to the sub-advisory agreement dated January 27,
2004 (the "Agreement") among WT Investment Trust I (the "Fund"), on behalf of
Large Cap Quantitative Series, Mid Cap Quantitative Series and Small Cap
Quantitative Series (the "Series") each series of the Trust, Rodney Square
Management Corporation (the "Adviser") and Parametric Portfolio Associates LLC
(the "Sub-Adviser) is made and entered into as of the 28th day of March 2005.

            WHEREAS, the Fund, the Adviser and the Sub-Adviser have entered into
the Agreement on behalf of the Series; and

            WHEREAS, the Fund, the Adviser and the Sub-Adviser desire to amend
the Agreement to avail themselves of a new exemptive rule promulgated by the
Securities and Exchange Commission under the Investment Company Act of 1940 (the
"1940 Act") and certain changes to other exemptive rules under the 1940 Act;

            NOW, THEREFORE, pursuant to Section 19 of the Agreement, and
intending to be legally bound hereby, the parties hereto hereby amend the
Agreement as follows:

            (1) Section 7.c. of the Agreement, is hereby deleted in its entirety
and replaced with the following:

                  The Sub-Adviser agrees that it will not execute any portfolio
                  transactions for the Series Account with a broker or dealer
                  which is (i) an affiliated person of the Fund, including the
                  Adviser or any sub-adviser for any Series of the Fund; (ii) a
                  principal underwriter of the Fund's shares; or (iii) an
                  affiliated person of such an affiliated person or principal
                  underwriter, unless such transactions are (x) exempt under
                  Rules 10f-3(b) or 17a-10, (y) executed in accordance with Rule
                  17e-1 of the 1940 Act and the Fund's Rule 17e-1 procedures, as
                  adopted in accordance with Rule 17e-1 or (z) executed in
                  accordance with Rule 10f-3(c) of the 1940 and the Fund's Rule
                  10f-3(c) procedures, as adopted in accordance with Rule 10f-3.
                  The Adviser agrees that it will provide the Sub-Adviser with a
                  list of such brokers and dealers.

            (2) The Agreement is hereby amended to add a new Section 7.d., to
read in its entirety as follows, and to designate current Section 7.d. as
Section 7.e.

                  The Sub-Adviser acknowledges and agrees that in connection
                  with the exemptions provided under Rules 10f-3(b), 12d3-1, and
                  17a-10 under the 1940 Act, the Sub-Adviser (i) will not
                  consult with any other sub-adviser of the Series, which is
                  advising the Series, concerning the Sub-Adviser or its
                  affiliated persons'



                  transactions with the Series in securities or other assets of
                  the Series, and (ii) consistent with the other provisions
                  hereof, the Sub-Adviser is limited to providing investment
                  advice with respect to the Series Account; and

            (3) All other provisions of the Agreement not affected by this
Amendment remain in full force and effect.

            (4) To the extent that state law is not preempted by the provisions
of any law of the United States heretofore or hereafter enacted, as the same may
be amended from time to time, this Amendment shall be administered, construed
and enforced according to the laws of the State of Delaware.

            (5) This Amendment may be executed by facsimile and in more than one
counterpart, each one of which shall be deemed an original, and all of which
taken together shall constitute one and the same instrument.

            IN WITNESS WHEREOF, the undersigned parties have executed this
Amendment No. 1 to the Agreement as of the day and year first above written.

                       WT INVESTMENT TRUST I,
                       ON BEHALF OF THE LARGE CAP QUANTITATIVE SERIES, MID CAP
                       QUANTITATIVE SERIES AND SMALL CAP QUANTITATIVE SERIES

                       By: /s/ John R. Giles
                           ----------------------------------
                       Name: John R. Giles
                       Title: Vice President

                       RODNEY SQUARE MANAGEMENT CORPORATION

                       By:  /s/ Robert J. Christian
                           ----------------------------------
                       Name: Robert J. Christian
                       Title: President

                       PARAMETRIC PORTFOLIO ASSOCIATES LLC

                       By: /s/ Aaron Singleton
                           ----------------------------------
                       Name: Aaron Singleton
                       Title: CFO

                                      -2-