<DOCUMENT>
<TYPE>EX-15
<SEQUENCE>3
<FILENAME>dex15.txt
<DESCRIPTION>AWARENESS LETTER OF ARTHUR ANDERSEN LLP
<TEXT>
<PAGE>

                                                                      EXHIBIT 15

Bank of America, N.A., as Trustee
  for the Cross Timbers Royalty Trust:

We are aware that XTO Energy Inc. and Cross Timbers Royalty Trust have
incorporated by reference in Registration Statement No. 333-56983 on Form S-3,
and that XTO Energy Inc. has incorporated by reference in its Registration
Statement No. 33-55784 on Form S-8, Cross Timbers Royalty Trust's Form 10-Q for
the quarter ended September 30, 2001, which includes our report dated October
12, 2001, covering the unaudited interim financial information contained
therein. Pursuant to Regulation C of the Securities Act of 1933, that report is
not considered a part of the registration statement prepared or certified by our
firm or a report prepared or certified by our firm within the meaning of
Sections 7 and 11 of the Act.

ARTHUR ANDERSEN LLP

Fort Worth, Texas
October 19, 2001

</TEXT>
</DOCUMENT>
