This large one volume 1856 edition is scarcer than the two volume edition. This atlas was the first world atlas produced by Colton, after many years of issuing pocket maps, wall maps, guides, and maps for books. The atlas was one of the finest and most accurate of the period - it had a long publishing run, continuing for over thirty years (with the title changed to Colton's General Atlas after 1856). These maps are great for locating land descriptions sinece the entire states show township and range lines