Baltimore Maryland detailed city plan Patapsco River c. 1867-9 Mitchell mapPlan of Baltimore. (North America, United States, Mid Atlantic, Maryland, Baltimore, Detailed City Plan, Patapsco River). Issued c. 1867 9, Philadelphia by S. A. Mitchell. Fine mid 19th century engraved map, lithographed with original hand color. Numerous specific buildings are identified, the earliest railroad lines shown clearly. Mitchell maps of this mid century era were issued with a range of color as well as variant decorative borders, including