[Transcript of invoice for the Special Mission to the United States made by Stephen F. Austin, Branch T. Archer, and William H. Wharton, April 23, 1836], text, April 23, 1835; (https://texashistory.unt.edu/ark:/67531/metapth216998/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .