LEWIS, MERIWETHER and WILLIAM CLARK History of the expedition under the command of Captains Lewis and Clark, to the sources of the Mississippi, thence across the Rocky Mountains and down the River Columbia to the Pacific Ocean. Performed during the years 1804-5-6. By the order of the Government of the United States. Philadelphia: Bradford and Inskeep and Abm. H. Inskeep of New York, 1814. First edition, with folding map in expert facsimile.Two volumes. Full leather boards (22 cm. tall), with simple gilt ruling to spine; gilt lettering to red leather compartment. Contents foxed. With ownership inscription to title page of second volume. Illustrated with five maps and charts. The large folding map is supplied in expert facsimile.Covering some eight thousand miles in slightly more than twenty-eight months, Lewis and Clark retrieved the first reliable information concerning the areas acquired in the Louisiana Purchase.