Bell, C. M. (Charles Milton), ca. 1849-1893. Easterly, Thomas M. (Thomas Martin), 1809-1882. Gardner, Alexander, 1821-1882. Gurney, Benjamin. Gurney, Jeremiah, 1812-1895. Jackson, William Henry, 1843-1942. McClees, James Earle, 1821-1887. Shindler, A. Zen
Bien, Julius, 1826-1909 Geographical Surveys West of the 100th Meridian (U.S.) O'Sullivan, Timothy H., 1840-1882 Wheeler, George M. (George Montague), 1842-1905