From the Santa Fe Crossing to the Coo-che-to-pa Pass; from Explorations and Surveys made under the direction of the Hon. Jefferson Davis Secretary of War by Capt. J.W. Gunnison Topl. Engrs. assisted by Capt. E.G. Beckwith 3d Artillery. R.H. Kern Topographer in the field. Map made under the supervision of Capt. E.G. Beckwith 3d Artillery by F.W. Egloffstein, Topographer for the Route. 1855. Explorations and surveys for a railroad route from the Mississippi River to the Pacific Ocean. War Department. Route near the 38th & 39th Parallels. Map No. 3. Engr. by Selmar Siebert.