Campbell, Andrew Donaldson. [Letter from Andrew D. Campbell to Elizabeth Upshur Teackle, May 25, 1827], letter, March 25, 1827; (https://texashistory.unt.edu/ark:/67531/metapth1685527/m1/1/: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .