AMENDMENT TO SUB-ADVISORY AGREEMENT STANDISH MELLON ASSET MANAGEMENT COMPANY LLC

Exhibit 23(d)(xxi)(b)

AMENDMENT TO SUB-ADVISORY AGREEMENT

▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ASSET MANAGEMENT COMPANY LLC

This Amendment to the Agreement between WT MUTUAL FUND (the “Fund”), ▇▇▇▇▇▇ SQUARE MANAGEMENT CORPORATION (the “Adviser”) and ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ASSET MANAGEMENT COMPANY LLC (the “Sub-Adviser”) dated May 16, 2006 (the “Sub-Advisory Agreement”) is made as of August 16, 2007.

WHEREAS, pursuant to the Sub-Advisory Agreement, the Fund and Adviser appointed the Sub-Adviser as a portfolio manager with respect to assets of the Wilmington Multi-Manager Real Asset Fund (the “Portfolio”), as assigned by the Adviser; and

WHEREAS, the Sub-Adviser has managed the portion of the Portfolio’s assets allocated by the Adviser (“Portfolio Account”) to investment in Treasury Inflation-Protected Securities (“TIPS”) and has received a sub-advisory fee for providing the service, as determined in accordance with Schedule C of the Agreement; and

WHEREAS, the Fund and Adviser desire that the Sub-Adviser manage an additional portion of the Portfolio’s assets in accordance with its “Short Term Investment Fund Plus Strategy” and the Sub-Adviser desires to receive compensation for providing this service; and

WHEREAS, the Sub-Advisory Agreement provides that it may be amended by written agreement among the Fund, the Adviser and the Sub-Adviser, subject to approval by the Board of Trustees of the Fund (the “Trustees”); and

WHEREAS, at a meeting of the Trustees held on August 16, 2007, the Trustees approved this amendment of the Sub-Advisory Agreement. In all other respects, the Sub-Advisory Agreement remains unchanged.

NOW THEREFORE, in consideration of the promises and mutual covenants herein contained, the Fund, Adviser and Sub-Adviser agree to amend the Sub-Advisory Agreement as follows:

     1. The Adviser and Fund hereby appoint and employ the Sub-Adviser as a portfolio manager of an additional sub-account of the Portfolio Account, to be managed by Sub-Adviser pursuant to its “Short-Term Investment Fund Plus Strategy”, in accordance with the terms and conditions set forth in the Sub-Advisory Agreement;

     2. Schedule C of the Sub-Advisory Agreement (the “Fee Schedule”) is hereby amended to include the fee payable to the Sub-Adviser in accordance with Section 10 of the Sub-Advisory Agreement for providing the services described herein.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to the Sub-Advisory Agreement to be executed, as of the 16^th day of August, 2007.

WT MUTUAL FUND, on behalf of the
Wilmington Multi-Manager Real Asset Fund

By:
Name:
Title:

▇▇▇▇▇▇ SQUARE MANAGEMENT CORPORATION

By:
Name:
Title:

▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ASSET MANAGEMENT COMPANY LLC

By:
Name:
Title:

SCHEDULE C

For the services to be provided to the Portfolio pursuant to the Sub-Advisory Agreement, as amended on August 16, 2007, the Fund shall pay the Sub-Adviser out of the assets of the Portfolio, as follows:

TIPS Sub-account

0.08% on the first $25 million of assets;
0.04% on the next $25 million of assets;
0.02% on assets over $50 million.

Short-Term Investment Fund Plus Sub-account

0.08% on assets

The fee shall be payable monthly as soon as practicable after the last day of each month based upon the average daily net assets of each Sub-Account of the Portfolio Account and similarly managed accounts of clients of the Adviser or any of the Adviser’s affiliates.

Dated: August 16, 2007