U.S. Pacific Railroad Exploration & Survey, War Department, Geological Section from the Mississippi River to the Pacific Ocean, along the route explored by Lieut. A. W. Whipple, Corps of Topl. Engrs., near the parallel of 35 degrees north latitude, 1853-1854, prepared to accompany the preliminary report by Mr. Jules Marcou, Geologist of the Expedition, Lith. by A. Hoen & Co., Balt. Md., 1854