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[Washington, D.C.] :
War Dept., Corps of Engineers, U.S. Army
Title from item.
On item: War Department, Corps of Engineers, U.S.A. Geographical Explorations and Surveys West of the 100th Meridian. Expedition of 1873. 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, Commanding.
Plate number: No. 33