History of the Expedition Under the Command of Captains Lewis and Clarke: to the Sources of the Missouri ... Performed During the Years 1804, 1805, 1806, by Order of the Government of the United States

New York: Harper, 1855. Later ed. Two 12mo uniform volumes in dark brown polished cloth-backed boards; 371 & 395p; 1 b&w folded map to frontis of vol 1; 16 cm. An altogether very good set with a few minor flaws: rear end paper of volume two partly torn (closed tear); minor edge-wear and chafing to board edges; a bit of foxing, mainly to endpaper and preliminary; else tight, clean and very good. . Hardcover.

Spine titles read: The Family library [;] Rocky Mountains [;] Lewis & Clarke [;] Vol. 1 [or] 2. Exploration of North America. Discoveries in geography. Travel.West (U.S.) -- History -- To 1848. Western (U.S.) -- Description and travel. Missouri River -- Description and travel. Columbia River -- Description and travel. West (U.S.) -- Discovery and exploration. Missouri River. United States -- Columbia River.