Highly detailed map, colored by counties and showing towns, roads, railroads, lakes, Post Offices, islands, sand bars, soundings, shoals and a host of other details. Large inset of Monroe and Dade Counties, including the Keys.
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.