38 x 52 cm. "Topography: Colorado & Utah: U.S. Geolog. Survey Territories, Prof. Hayden in charge and from personal notes & obs--Wyoming: maps, General Land Office & personal notes." "October, 1878." Includes other wagon roads, trails, rivers, ranches, Indian agencies and military reservation. "Drawn by Lieutenant C. A. H. McCauley, 3rd Artillery." "Sen. Ex. Doc. No. 62, 45th Congress 3rd Sess." Original publisher: GPO, Series: Sen. ex. doc no. 62, 45th Congress, 3rd session.