Interesting early map of Colorado, colored by counties.
Shows towns, rivers, lakes, roads, mountains, and other details.
In Southwestern Colorado, the mining boom in San Juan, San Miguel and Ouray counties is now evident, with towns such as Telluride, Ophir, Red Mountain, Ironton and other small towns now shown.
O. W. Gray was a publishing firm based in Philadelphia. Later, they published as O. W. Gray & Son. They published atlases in the late nineteenth century. Gray's National Atlas was one of the most successful commercial ventures of the 1870s and one of the last to employ hand coloring on maps.