A map of the internal provinces of New Spain: The outlines are from the sketches of, but corrected and improved by Captain Zebulon M. Pike, who was conducted through that country, in the year 1807 by order of the Commandant General of those provinces., map, 1810; (https://texashistory.unt.edu/ark:/67531/metapth192818/m1/1/: accessed April 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .