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

Many black and white drawings and color plates of route, including fossil fishes, shells, plants. Geological map of vicinity of San Francisco, PDF pp. 269. Geological map of Tejon Pass, California, PDF pp. 325, Geological map of San Diego and Colorado River, PDF pp. 360. Geological map of north California, PDF pp. 459.

Johnson Annotation

Explorations of Railroad Routes from the Mississippi to the Pacific. [791-801] Journals of expeditions, including descriptions of Indians; a northern route from Minnesota, along the Upper Missouri, to Washington; a central route from Missouri, across the Great Basin, to California; a southern route from the Red River, along the Rio Grande and Colorado Rivers, to southern California; a report on Indian tribes of the Southwest is included in pt. 3 (Serials 760 and 793).