Map of part of south western Colorado, January 10, 1878

38 x 49 cm. Relief shown by hachures and spot heights. "Atlas sheet no. 61(D)." "Issued Jan. 10th 1878." "Expeditions of 1873, 74, 75 & 76 under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army." Prime meridians: Washington, D.C. and Greenwich. Includes sectional diagram showing how atlas sheets fit together. "Weyss, Lang & Herman, del." "By order of the honorable the Secretary of War." "Under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." " J. C. Spiller, Louis Nell, topographical assistants." "Expeditions of 1873, 74, 75 & 76 under the command of 1st. Lieutenant William L. Marshall, Corps of Engineers, U. S. Army, 1st Lieutenant Eric Bergland, Corps of Engineers, U. S. Army, Executive Officers and field astronomers." Original publisher: U.S. Geographical Surveys West of the 100th Meridian, Scale 1 inch to 4 miles or 1:253440.