Ells, Claflin & Co., Dayton, 1847. Lewis and Clarke's Journal to the Rocky Mountains in the Years 1804, -5, -6; as Related by Patrick Gass, One of the Officers in the Expedition. Dayton, Ohio: Ells, Claflin, & Co., 1847. 8vo. 238 + [2] ad. pp. Woodcut frontispiece by Grosvenor, full-page portrait vignettes of Captains Lewis and Clarke, numerous full-page woodcut illustrations (margins and illustrations heavily foxed and toned, few plates crudely colored in a contemporary hand). Rebound in grey paper over boards, printed paper labels on spine, original spine label housed in pocket at rear (large tear with void to p. 329). Later reprinting of the original writings of the famous journey, written by Gass, soldier and valued member of the Lewis and Clark expedition. [Attributes: Hard Cover]