Riviere des Lacs to the Rocky Mountains : from explorations and surveys
Scale 1:1,200,000. 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) LC Railroad...
Lambert, John - Davis, Jefferson - Stevens, Isaac Ingalls - Siebert, Selmar - United States. War Department
Stevens, Isaac Ingalls - Northern Pacific Railroad Company
Northern Pacific Railway 1900.
Map of northern United States from the Great Lakes to the Pacific Ocean showing reliief by hachures, drainage, cities and towns, forest and timber, Indian and military reservations.
L.L. Poates Engr'g Co. - Northern Pacific Railway Company