Costley, John M.. Documents pertaining to the case of The State of Texas vs. Ewing F. Calhoun, cause no. 335, 1853, Legal Document, 1853; digital images, (http://texashistory.unt.edu/ark:/67531/metapth193963/ : accessed May 25, 2013), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting Travis County District Clerk's Office, Austin, Texas.
