Sayles, John. [Letter from John Sayles to Milton McKenzie, October 6, 1934], letter, October 6, 1934; (https://texashistory.unt.edu/ark:/67531/metapth1156924/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .