This is an attractive, important seminal folding map showing the principal Native North American tribes, largely color-coded.  Importantly, this map is believed to be the best and most accurate map of the West of its time.  It includes and combines the fruits of many previous exploration of the West, such as the California explorations by Jedidiah Strong Smith, J. C. Fremont's explorations, Horacio Hale, etc.  The then relatively new discoveries shown in the West by the non-Native Americans include Pyramid Lake, The Great Interior Basin or California Deserts, South Pass, and Fremont Peak.  Topography, river and lakes are shown in detail.  Some of the revisions were made with a stamp, instead printing with the lithographic plate, and in this map two such additions are the Pawnees and Arrapahoes.  From Transactions of the American Ethnological Society, 1848.