Compiled under direction of Lieut. Edward Maguire, Corps of Engrs., by Prvt. Julius J. Durage, Topogl. 1 inch to ca. Settlements, military posts, wagon roads, Indian reservations, and routes of exploration.
Relief is shown by hachures.
Portion of map showing extreme southwestern Montana is missing. Compiled from the official Records of the General Land Office. 1 inch to 18 miles. County boundaries and military and Indian reservations are shown in color. Also shows status of public land surveys, towns, locations of U.S. land offices, and railroad lines and land-grant limits.