[Transcript of letter from Stephen F. Austin to Martín Perfecto de Cos, [October 17, 1835]], letter, October 17, 1835; (https://texashistory.unt.edu/ark:/67531/metapth216885/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .