Scarce example of Gray's map of the Southwest.
The map is hand colored by counties, and shows early mining districts, towns, roads, mountains, rivers, Indian Tribes, Railroads, The Gadsden Purchase Line (noting a cost of $10,000,000) and a host of other details. A scarce map, which appeared only in the first edition of Gray's Atlas.
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.