From the Rio Grande to the Pacific Ocean from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War by Lieut. A.W. Whipple, Topogl. Engrs. and Lieut. J.C. Ives, Topogl. Engrs. A.H. Campbell, Civil Eng. and Surveyor, Asst. Surveyors: Wm. White Jr., N.H. Hutton, and J.P. Sherburne. 1853-4. Explorations and Surveys for a Rail Road Route from the Mississippi River to the Pacific Ocean, War Department, Route Near the 35th Parallel, Map No. 2. Engr. by Selmar Siebert. Drawn by John D. Hoffmann.