Kempner, Isaac H. (Isaac Herbert), 1873-1967. [Letter from I. H. Kempner to Natalie Schafer, December 26, 1952], letter, December 26, 1952; (https://texashistory.unt.edu/ark:/67531/metapth1461284/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .