History of the expedition under the command of Lewis and Clark: to the sources of the Missouri river, thence across the Rocky mountains and down the Columbia river to the Pacific ocean, performed during the years 1804-5-6, by order of the government of the United States

I. Preface by the editor. Preface to the original edition [by Paul Allen] Memoir of Meriwether Lewis, by Thomas Jefferson. Supplement to Jefferson's Memoir of Meriwether Lewis, by Dr. Coues. Memoir of William Clark, by D. Coues. Memoir of Patrick Gass, by Dr. Coues. Bibliographical introduction [by Dr. Coues] History of the expedition.

II. History of the expedition.

III. History of the expedition. Appendices: 1. Essay on an Indian policy. 2. Estimate of the western Indians. 3. Summary statement. 4. Meteorological register.

IV. Maps, tables and index.