1. Map of the territory of the United States from the Mississippi River to the Pacific Ocean originally prepared to accompany the reports of the explorations for a Pacific railroad route / [cartographic material] Yale Public content 1867. 2017-11-09T18:54:28Z. 2018-06-04T17:26:54Z. Warren, G. K. (Gouverneur Kemble), 1830-1882, cartographer. War Dept. English. cartographic image. Public. West (U.S.) and United States, West.