[Letter from Harris L. Kempner to the American Indemnity Company, November 4, 1964], letter, November 4, 1964; (https://texashistory.unt.edu/ark:/67531/metapth1425298/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .