History of the expedition under the command of Captains Lewis & Clarke to the sources of the Missouri, thence across the Rocky Mountains and down the River Columbia to the Pacific Ocean : performed during the years 1804-5-6 by order of the government of the United States / A complete reprint of the Biddle ed. of 1814, to which all the members of the expedition contributed, with an account of the Louisiana Purchase by John Bach McMaster, and notes upon the r.