EXHIBIT 15.1


            AWARENESS LETTER--UNAUDITED INTERIM FINANCIAL INFORMATION



XTO Energy Inc.
Fort Worth, Texas

     We are aware that our report dated April 23, 2001, which was included in
the Cross Timbers Oil Company Quarterly Report on Form 10-Q for the quarter
ended March 31, 2001, and our report dated July 25, 2001, which was included in
the XTO Energy Inc. (formerly known as Cross Timbers Oil Company) Quarterly
Report on Form 10-Q for the quarter ended June 30, 2001, are being incorporated
by reference in this Registration Statement on Form S-3.

     We also are aware that the aforementioned reports, pursuant to Regulation C
under the Securities Act of 1933, are not considered a part of the Registration
Statement prepared or certified by our firm within the meaning of Sections 7 and
11 of that Act.


ARTHUR ANDERSEN LLP

Fort Worth, Texas
October 17, 2001