Context

Context of Map of the territory of the United States from the Mississippi to the Pacific Ocean : ordered by Jeff'n 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. Engr. by Selmar Siebert
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