This very attractive pocket folding map covers the USA from Chicago and New Orleans west to the Pacific Ocean. Expectedly, great deal of topographical detail is given as well as towns, cities, the proposed and existing railroads (the Pacific Railroad being complete from Iowa to San Francisco), wagon roads, the Pony Express route, Fremont's exploration routes and dates, etc. Yellowstone National Park does not yet appear in the newly organized Wyoming Territory. Decorated by an elaborate border which is customary for Colton.