Map of the Gadsden Purchase : Sonora and portions of New Mexico Chihuahua & California / by Herman Ehrenberg C.E.; from his private notes and those of Colonel Gray Maj: Heintzelman, Lieut: Parks and others ; the Yaqui, Mayo and Fuerte valleys are by A. Fleury Millitary [sic] Eng: of Sonora
A fragile map in three sections. Shows a number of alternate railway routes between El Paso and Ft. Yuma. The purchase was made to accommodate the rail line. Prime meridian: GM. Relief: hachures. Graphic Scale: Miles. Projection: Conic. Printing Process: Lithography. Verso Text: MS note: 44064 Maps Gadsden Purchase Ehrenberg, Herman Cincinnati, 1858.