39 x 52 cm. Relief shown by hachures and spot heights "Issued June 30, 1881." "Expeditions of 1873, 1878 and 1879 under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers U.S. Army." Geological map Probably originally published as part of the geological atlas which is an appendix to the Surveys' Report upon United States geographical surveys west of the one hundredth meridian. "Prof. John J. Stevenson, geological assistant." "By order of the honorable the Secretary of War under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." Original publisher: U.S. Geographical Surveys West of the 100th Meridian, Scale: 1 inch to 4 miles or 1: 253440.

39 x 50 cm. Relief shown by hachures and spot heights. "Issued May 7th 1877-2nd ed. June 30th, 1881." "Expeditions of 1878 and 1879 under the command of 1st. Lieut. Geo. M. Wheeler, Corp. of Engineers U.S. Army." "Weyss Herman & Lang Del." Prime meridians: Washington, D.C. and Greenwich Geological map Probably originally published as part of the geological atlas which is an appendix to the Surveys' Report upon United States geographical surveys west of the one hundredth meridian. "Prof. John J. Stevenson, geological assistant." "By order of the honorable the Secretary of War under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." Original publisher: U.S. Geographical Surveys West of the 100th Meridian, Scale: 1 inch to 4 miles or 1: 253440.

37 x 49 cm. Relief shown by hachures and spot heights. Prime meridians: Greenwich and Washington, D.C. "Atlas sheet no. 70(A)." "Issued May 7th, 1877." "Expeditions of 1874, 1875 & 1876 under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineer, U.S. Army." "Weyss, Herman & Mahlo, 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." Original publisher: U.S. Geographical Surveys West of the 100th Meridian, Scale: 1 inch to 4 miles or 1: 253440.

38 x 48 cm. Relief shown by hachures and spot heights. "Atlas sheet no. 53(C)." "Issued May 7th 1877." "1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army." Prime meridians: Greenwich and Washington, D.C. Includes sectional diagram that shows how atlas sheets fit together. "Weyss, Herman & Lang, del." "Louis Nell, J. J. Young, topographical assistants." "Under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." "Expeditions of 1873 and 1876 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." "By order of the honorable the Secretary of War." Original publisher: Graphic Co. photo., Scale: 1 inch to 4 miles or 1:253440.