[Letter from Sally Thornhill to Mary Ann Moore, Linnet White and Claude D. White, March 10, 1907], letter, March 10, 1907; (https://texashistory.unt.edu/ark:/67531/metapth203971/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .