Carleton, Osgood; Doolittle, Amos; Mitchell, John & Jay, John. Massachusetts (eastern part, i.e., the District of Maine), map, 1938; (https://texashistory.unt.edu/ark:/67531/metapth493658/m1/1/: accessed March 29, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .