[Letter from Gertrude Osterhout to John Patterson Osterhout, November 4, 1880], letter, November 4, 1880; (https://texashistory.unt.edu/ark:/67531/metapth255561/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .