L.C. and G.T. Heydrick. Heydrick's map of Eastland and part of Erath, Comanche, Brown, Coleman and Callahan Counties, Texas., map, 1918; (https://texashistory.unt.edu/ark:/67531/metapth220478/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .