Piedras, José de las. [Transcript of Letter from José de las Piedras to Stephen F. Austin, March 7, 1830], letter, March 7, 1830; (https://texashistory.unt.edu/ark:/67531/metapth217404/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .