Relief shown by hachures and spot heights. Shows natural features, and elevation, populated places, wagon routes, proposed railroad routes and explorers' routes. Longitude west from Washington and from Greenwich. "Entered according to Act of Congress in the year 1855 by J.H. Colton & Co in the Clerk's Office of the District Court of the United States for the Southern District of New York." Plate "No. 51." from "Colton's Atlas Of The World, Illustrating Physical And Political Geography." 1 map : col. ; 29 x 36 cm. This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.