Costley, John M. Documents pertaining to the case of The State of Texas vs. George Foos, cause no. 302, 1853, legal document, 1853; (https://texashistory.unt.edu/ark:/67531/metapth193929/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .