Map of the territory of the United States from the Mississippi River to the Pacific Ocean ordered by Jeff' Davis, Secretary of War to accompany the reports of the explorations for a railroad route; Compiled from authorized explorations and other reliable data by G. K. Warren ... under the direction of W. H. Emory in 1854 and of A. A. Humphreys 1854-5-6-7-8. Drawn by E. Freyhold. Engr. on stone by J. Bien. Maps maps university-of-michigan