1890. Morton, Robert H. Prime meridians: Greenwich, Washington.; Relief shown by hachures. 81 x 51 centimeters Scale approximately 1:750,000 General Map Collection. General Land Office (Washington, D.C).
Search Results
1897. Morton, Robert H., O'Hare, Daniel, and United States. General Land Office. Drafting Division. Relief shown by shading and spot heights. Also shows public lands. "The Friedenwald Co. Photo-Lith. Balto." Longitude "West from Washington." 1 map...
1887. Morton, Robert H. and United States. General Land Office. Relief shown by hachures and spot heights. "Compiled from the official records of the General land Office and other sources ..." Prime meridians: G...