Riviere des Lacs to the Rocky Mountains : from explorations and surveys
Relief shown by hachures. At head of title: Route near the 47th and 49th Parallels. Map no. 2. "Drawn by John Lambert. Topographer of the exploration, assisted by J. R. P. Mechlin." 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 1:1,200,000. LC Railroad maps, 155 Available also through the Library of Congress Web site as a raster image.
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