From the valley of the Mud Lakes to the Pacific Ocean
At head of title: Route near the 41st Parallel. Map no. 4. Relief shown by hachures. From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps ... to Illustrate the Various Reports ... (Washington, 1859) Description derived from published bibliography. Scale 1:760,320. LC Railroad maps, 168 Available also through the Library of Congress Web site as a raster image.