Title A journal of the voyages and travels of a corps of discovery, under the command of Capt. Lewis and Capt. Clarke of the army of the United States [microform] : from the mouth of the river Missouri through the interior parts of North America to the Pacific Ocean, during the years 1804, 1805 & 1806 ; containing an authentic relation of the most interesting transactions during the expedition,--a description of the country,--and an account of its inhabitants, soil, climate, curiosities and vegetable and animal productions / By Patrick Gass, one of the persons employed in the expedition ; with geographical and explanatory notes by the publisher.