Exhibit 24 (e) 1 1 POWER OF ATTORNEY The undersigned, as President and Chief Executive Officer of West Texas Utilities Company (the "Company"), hereby makes, constitutes and appoints R. Russell Davis his true and lawful attorney-in-fact and agent, with full power and authority to execute in the name and on behalf of the undersigned, in any and all capacities, the Company's Annual Report on Form 10-K for 1994 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorney-in-fact, and agent, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorney-in-fact and agent, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 31 day of January, 1995. Glenn Files Subscribed and sworn to before me this 31st day of January, 1995 by Glenn Files. Martha Murry Notary Public My Commission Expires: 11-19-96