Includes notes on "History", 1870 census table, "Progress of Chicago" showing population figures from 1837 and "Illinois in the Forty-first Congress.";City of Chicago (42 x 26 cm.);1 map, colored;Colored map of Illinois;Colors used to highlight political and other divisions and boundaries;Includes notes on "History," 1870 census table, "Progress of Chicago" showing population figures from 1837 and "Illinois in the Forty-first Congress".; City of Chicago -- 42 x 26 cm.;Townships, sections, counties;108 x 72 cm.;1:570,240 or 9 miles to an inch.