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First edition of Gray's detailed map of Baltimore, colored by wards and showing streets, rail lines, parks, buildings, stations and a host of other details.

Large inset of the Patapsco River and approaches. Includes a population table, showing the various census populations dating back to 1790 and current census by wards.

O.W. Gray Biography

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.