Reports of Explorations and Surveys, To Ascertain the Most Practicable and Economical Route for a Railroad From the Mississippi River to the Pacific Ocean. Made Under the Direction of the Secretary of War, In 1853-4, According to Acts of Congress of March 3, 1853, May 31, 1854, and August 5, 1854. Washington: A.O.P. Nicholson, Printer. 1855. (House of Representatives, 33d Congress, 2d Session. Ex. Doc. No. 91.)