Baltimore Maryland detailed city plan Patapsco River 1866 Mitchell mapPlan of Baltimore. (North America, United States, Mid Atlantic Region, Maryland, Baltimore, Patapsco River). Issued c. 1866, Philadelphia by S. A. Mitchell. 19th century engraved map, with original hand color. Mitchell maps of this mid century era were issued with a range of color as well as variant decorative borders. Nice looking example, pleasing age patina, any minor age flaws easy to overlook or forgive. Sheet Measures c. 12 1 2" H x 15 1 4" W.