Oklahoma State Penitentiary, McAlester. [Henry Methvin Oklahoma State Penitentiary Index Card, 1935], legal document, Date Unknown; (https://texashistory.unt.edu/ark:/67531/metapth78893/m1/1/: accessed February 15, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .