Firsat edition of Gray's map of Boston and Vicinity.
Shows towns, roads, buildings, rail lines, stations, public squares, wharfs and other local features. Large in set map of Boston Harbor. The map is similar to the double page map issued by Walling & Gray, but is apparently only the center part of the Walling & Gray version of the map, which does not extend as far east or west as the earlier precursor map, focusing more on Boston proper.
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.