This, the first authentic history of the expedition, was written by Nicholas Biddle, and edited by Paul Allen. ef. E. Coues, Hist. of the expedition, 1893: appleton, Cycl.amer. biogr.
The appendix contains: (1) Observations and reflections onthe present and future state of upper Louisiana, in relation to the government of the Indian nations ... and the trade and intercourse with the same. By Captain Lewis.(2) A summary statement of the rivers, creeks and most remarkable places, their distances from each other, & their distances from the Mississippi, ascending the Missouri, across the Rocky mountains, and down the Columbia to the pacific ocean, as was explored in the years 1804. 5 and 6 by Captains Lewis and Clarke. (3) Estimate of the western Indians. (4) Thermometrical observations, showing also the rise and fall of the Mississippi (Missouri); appearances of weather, winds, etc. (5) Remarks and reflections [January 1, 1804, to August 22, 1806]