Original journals of the Lewis and Clark Expedition, 1804-1806 ; printed from the original manuscripts in the library of the American Philosophical Society and by direction of its committee on historical documents, together with manuscript material of Lewis and Clark from other sources, including note-books, letters, maps, etc., and the journals of Charles Floyd and Joseph Whitehouse, now for the first time published in full and exactly as written / Edited with introduction, notes, and index, by Reuben Gold Thwaites.