From explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War by Capt. E. G. Beckwith, 3d. Artillery. F. W. Egloffstein, Topographer for the Route, 1855. Egloffstein, F. W., 1824-1885. CREATED/PUBLISHED Washington, D.C. Selmar Siebert's Engraving & Printing Establishment, [1859] NOTES Scale 1:760,320. At head of title: Route near the 41st Parallel. Map no. 4. Relief shown by hachures. From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps … to Illustrate the Various Reports … (Washington, 1859)