Map of the territory of the United States from the Mississippi to the Pacific Ocean, ordered by the Hon. Jeff'n Davis, Secretary of War, to accompany the Reports of the Explorations for a Railroad Route.
Made in accordance with the 10th and 11th sections of the Army Appropriation Act of March 1853. Compiled from authorized explorations and other reliable data by Lieut. G. K. Warren, Topl. Engrs. in the Office of Pacific R.R. Surveys. War Dep. under direction of Bvt. Maj. W. H. Emory, Topl. Engr. in 1854 and of Capt. A.a. Humphreys, Topl. Engrs., 1854-5-6-7; engr. by Selmar Siebert.

Serial Set 768-02 (33-2) S. exdoc. 78, map 18
Serial Set 801 (33-2) H. exdoc. 91, map 6
Scale: 1:3,000,000
Size: 117 x 108 cm.
1857

Shows dense network of trails, exploratory routes, and roads involved with all of the explorations and surveys for the Pacific Railroad conducted by the Office of Pacific Railroad Surveys. Shows detailed hydrology and topography including mountains and passes. Includes towns, villages, and missions. Shows the general location of Indian tribal lands. Includes list of authorities for adopted survey information from prior explorations.