Illinois state 1850 thomas & Cowperthwait fine detailed hand color mapA New Map of the State of Illinois (North America, United States, Illinois, State Maps, Canals, Railroads). Issued Philadelphia, 1850 by Thomas Cowperthwait & Co. for S. A. Mitchell. Fine and uncommon mid 19th century antique engraved and lithographed map with original hand color. A decorative border surrounds the map. A lovely, clean example, with only minor signs of age (such as toning in the margins). Well preserved and pleasing. Sheet measures c.