Allen, Rupert C. [Letter from Rupert C. Allen to Sayles & Sayles, February 26, 1940], letter, February 26, 1940; (https://texashistory.unt.edu/ark:/67531/metapth1155242/m1/1/: accessed June 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .