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EXHIBIT 23.3
CONSENT OF INDEPENDENT PETROLEUM ENGINEERS
As independent petroleum engineers, Williamson Petroleum Consultants, Inc.
hereby consents to the incorporation by reference in this registration statement
on Form S-8 of our report entitled, "Evaluation of Oil and Gas Reserves to the
Interests of Tom Brown, Inc., Effective December 31, 1997, for Disclosure to the
Securities and Exchange Commission, Williamson Project 7.8529" dated March 4,
1998 included in the Annual Report on Form 10-K of Tom Brown, Inc. for the year
ended December 31, 1999 and to all references to our firm included in this
registration statement on Form S-8 to be filed with the Securities and Exchange
Commission.
WILLIAMSON PETROLEUM CONSULTANTS, INC.
Midland, Texas
December 5, 2000
