[LEWIS, Meriwether, and William CLARK]. Travels to the Source of the Missouri River and Across the American Continent to the Pacific Ocean. Performed by Order of the Government of the United States, in the Years 1804, 1805, AND 1806.... London. 1815. Three volumes. xxvi,411pp. plus three maps (one folding); xii,434pp. plus three maps; xii,394pp. Half title in second volume (as called for). Modern half calf and marbled boards, spines gilt, morocco labels, t.e.g. Occasional foxing. Very good. WAGNER-CAMP 13:3. HOWES L317, "aa." GRAFF 2481. WHEAT TRANSMISSISSIPPI 317. LITERATURE OF LEWIS AND CLARK 5a.3. SABIN 40830. FIELD 930 (note). The second British edition, after the Philadelphia and London editions of 1814. The narrative of the Lewis and Clark expedition is the most famous in the trans-Mississippi West, describing their twenty-eight-month trek from St. Louis to the Pacific and back again, with a wealth of geographical, ethnological, and natural historical observations en route. Because of the death of Lewis, the publication of the account was delayed until 1814, when the Philadelphia edition appeared. The 1814 British edition quickly sold out, necessitating this three-volume 1815 edition to satisfy public demand. It has a large folding map on fine paper on a somewhat larger scale than in the original American edition.