Gallatin, Albert, 1761-1849. Map of the Indian Tribes of North America, about 1600 A.D. along the Atlantic, & about 1800 A.D. Westwardly, map, 1836; (https://texashistory.unt.edu/ark:/67531/metapth190476/m1/1/: accessed April 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .