[Letter from Andrew D. Campbell to Littleton Dennis Teackle and his wife Elizabeth Upshur Teackle, June 26, 1817], letter, June 26, 1817; (https://texashistory.unt.edu/ark:/67531/metapth1631084/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .