Osterhout, P. [Letter from P. Osterhout to John Patterson Osterhout, August 26, 1873], letter, August 26, 1873; (https://texashistory.unt.edu/ark:/67531/metapth255368/m1/1/: accessed May 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .