[Letter from B. J. O'Neill to Isaac H. Kempner, July 19, 1949], letter, July 19, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1479958/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .