Stamp Canceler., patent, May 4, 1886; (https://texashistory.unt.edu/ark:/67531/metapth171257/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Stamp Canceler., patent, May 4, 1886; (https://texashistory.unt.edu/ark:/67531/metapth171257/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .