Map of routes for a Pacific railroad : compiled to accompany the report of Hon. Jefferson Davis, Sec. of War / G.K. Warren.Warren, Gouverneur Kemble, 1830-18821855"This map is a hurried compilation of all the authentic surveys and is designed to exhibit the relations of the different routes to each other."Appears in 33d Cong., 1st Sess., House Ex. Doc. 129, Serial 736.Relief shown by hachures and spot heights.cartographic