The Sunday Morning Herald. (Amarillo, Tex.), Ed. 1 Saturday, April 22, 1911, newspaper, April 22, 1911; (https://texashistory.unt.edu/ark:/67531/metapth289012/m1/1/: accessed June 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .