THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Cullen/Frost Bankers, Inc. (CFR)

3/27/2006 Proxy Information

Mr. Alexander is a former Chairman of Overton Bank & Trust which merged with Cullen/Frost.

In 1998, Cullen/Frost acquired Overton Bancshares and its banking subsidiary, Overton Bank and Trust, which had been co-founded by Edward Crawford's late father, Cass Overton Edwards II.

Mr. McClane previously served as President of Cullen/Frost Bankers, Inc.

Some of the Directors and executive officers of Cullen/Frost, and some of these persons’ associates, are current or past customers of one or more of the Company’s subsidiaries. Since January 1, 2005, transactions between these persons and such subsidiaries have occurred, including borrowings. In addition, the offices of the Hulen Financial Center of The Frost National Bank in Fort Worth, Texas are leased on a long-term basis from OPNB Building J.V., a Texas joint venture of which Mr. R. Denny Alexander, a Director of Cullen/Frost, owns a 13.3 percent interest and is the managing general partner. During 2005, lease payments of $757,656 were made by The Frost National Bank and Frost Insurance Agency, Inc. to OPNB Building J.V. In the opinion of management, all of the foregoing transactions, including borrowings, have been in the ordinary course of business, have had substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and did not involve more than the normal risk of collectibility. Additional transactions may take place in the future.

11/9/2005 8K Information

In 1998, Cullen/Frost acquired Overton Bancshares and its banking subsidiary, Overton Bank and Trust, which had been co-founded by Edward Crawford's late father, Cass Overton Edwards II.

4/18/2005 Proxy Information

Mr. McClane formerly served as President of Cullen/Frost Bankers, Inc.

Mr. Alexander is a former chairman of Overton Bank & Trust and director of Overton Bancshares, Inc. which merged with Cullen/Frost.

Some of the Directors and executive officers of Cullen/Frost, and some of these persons’ associates, are current or past customers of one or more of the Company’s subsidiaries. Since January 1, 2004, transactions between these persons and such subsidiaries have occurred, including borrowings. In addition, the offices of the Hulen Financial Center of The Frost National Bank in Fort Worth, Texas are leased on a long-term basis from OPNB Building J.V., a Texas joint venture of which Mr. R. Denny Alexander, a Director of Cullen/Frost, owns a 13.3 percent interest and is the managing general partner. During 2004, lease payments of $822,677.39 were made by The Frost National Bank and Frost Insurance Agency, Inc. to OPNB Building J.V. In the opinion of management, all of the foregoing transactions, including borrowings, have been in the ordinary course of business, have had substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and did not involve more than the normal risk of collectibility. Additional transactions may take place in the future.

4/14/2004 Proxy Information

Some of the Directors and executive officers of Cullen/Frost, and some of these persons’ associates, are current or past customers of one or more of the Company’s subsidiaries. Since January 1, 2003, transactions between these persons and such subsidiaries have occurred, including borrowings. In addition, the offices of the Hulen Financial Center of The Frost National Bank in Fort Worth, Texas are leased on a long-term basis from OPNB Building J.V., a Texas joint venture of which Mr. R. Denny Alexander, a Director of Cullen/Frost, owns a 13.3 percent interest and is the managing general partner. During 2003, lease payments of $790,663.94 were made by The Frost National Bank and Frost Insurance Agency, Inc. to OPNB Building J.V. In the opinion of management, all of the foregoing transactions, including borrowings, have been in the ordinary course of business, have had substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and did not involve more than the normal risk of collectibility. Additional transactions may take place in the future.

R. Denny Alexander is a former chairman of Overton Bank & Trust and director of Overton Bancshares, Inc. which merged with Cullen/Frost.

T. C. Frost and Patrick B. Frost are father and son.

Robert S. McClane formerly served as President of Cullen/Frost Bankers, Inc.

4/16/2003 Proxy Information

Some of the Directors and executive officers of Cullen/ Frost, and some of these persons’ associates, are current or past customers of one or more of the Company’s subsidiaries. Since January 1, 2002, transactions between these persons and such subsidiaries have occurred, including borrowings. In addition, the offices of the Hulen Financial Center of The Frost National Bank in Fort Worth, Texas are leased on a long-term basis from OPNB Building J.V., a Texas joint venture of which Mr. R. Denny Alexander, a Director of Cullen/ Frost, owns a 13.3 percent interest and is the managing general partner. During 2002, lease payments of $759,073 were made by The Frost National Bank and Frost Insurance Agency, Inc., which are subsidiaries of Cullen/Frost, to OPNB Building J.V. In the opinion of management, all of the foregoing transactions, including borrowings, have been in the ordinary course of business, have had substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and did not involve more than the normal risk of collectibility. Additional transactions may take place in the future.