Colton's map of the states and territories west of the Mississippi River to the Pacific Ocean : showing the overland routes, projected rail road lines, &c.G.W. & C.B. Colton & Co1870"Entered according to act of Congress in the year 1867 by G.W. & C.B. Colton ... "Also shows locations of Indian tribes.Includes text.Prime meridians: Greenwich and Washington.Relief shown by hachures and spot heights.cartographic