MITCHELL, Samuel Augustus (1792-1868). Mitchell's New General Atlas. Philadelphia: S. Augustus Mitchell, 1862. 4to (392 x 323 mm). 81 hand-colored lithographic maps and plans on 49 sheets (3 double-page). (Some minor browning, a few short marginal tears.) Publisher's half calf, brown gold-stamped cloth (spine split, some light wear). Third edition, with 25 leaves of maps pertaining to the United States, including 36 state, territory, region and city plans. The map of the United States depicts the route of the Pony Express, and a number of important trails and wagon roads including the Santa Fe and the Overland Mail Route to California; it also includes Utah and New Mexico territories as well as Arizona. Phillips 3558; Rumsey 568.