<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>3
<FILENAME>ex991-sc13da23_mesa.txt
<DESCRIPTION>EXHIBIT 99.1
<TEXT>


                                                                    EXHIBIT 99.1
                                                                    ------------



Pursuant to Rule 13d-1(k)(1)(iii) of Regulation 13D-G of the General Rules and
Regulations of the Securities and Exchange Commission under the Securities
Exchange Act of 1934, as amended, the undersigned agrees that the statement to
which this Exhibit is attached is filed on behalf of each of them in the
capacities set forth below.


                                   ALPINE CAPITAL, L.P.

                                   By:  /s/ Robert W. Bruce III
                                        ---------------------------------------
                                        Robert W. Bruce III,
                                        Manager


                                   /s/ Robert W. Bruce III
                                   --------------------------------------------
                                   ROBERT W. BRUCE III


                                   ALGENPAR, INC.

                                   By:  /s/ J. Taylor Crandall
                                        ---------------------------------------
                                        J. Taylor Crandall,
                                        President


                                   /s/ J. Taylor Crandall
                                   --------------------------------------------
                                   J. TAYLOR CRANDALL


</TEXT>
</DOCUMENT>
