The Oklahoma Safeguard. (Guthrie, Okla.), Vol. 13, No. 18, Ed. 1 Thursday, May 31, 1906, newspaper, May 31, 1906; (https://gateway.okhistory.org/ark:/67531/metadc275623/m1/1/: accessed April 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .