Thomas, Cowperthwait & Co.Greenwich, Washington.;1 map, colored;37 x 30 cm.;ca. 1:1,800,000;Thomas Cowperthwait & Co., 1854. -- No. 32.JPEG2000https://digital.library.illinois.edu/items/a2ae0210-994e-0134-2096-0050569601ca-7engThomas, Cowperthwait & Co. (Philadelphia), c1850.PublicA new map of the State of Illinois.MapsIllinois1850University of Illinois Urbana-Champaign