Morton, George M. The Cumby Rustler. (Cumby, Tex.), Vol. 19, No. 6, Ed. 1 Friday, May 6, 1910, newspaper, May 6, 1910; (https://texashistory.unt.edu/ark:/67531/metapth770445/m1/1/: accessed October 18, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .