Mitchell, S. Augustus (Samuel Augustus), 1792-1868Plan of Chicago.;Greenwich, Washington.;1 map, colored;33 x 25 cm.;ca. 1:2,100,000;published by S. Augustus Mitchell, Jr., 1864. -- Plate 38.JPEG2000https://digital.library.illinois.edu/items/a82f8160-994e-0134-2096-0050569601ca-5engS. Augustus Mitchell, Jr. (Philadelphia), c1861.PublicCounty map of the State of Illinois.MapsIllinois1861University of Illinois Urbana-Champaign