Gazetteer/Almanac
Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 181.
KNOX COUNTY, situated toward the west part of Illinois. Area, 792 square miles. Seat of justice, Knoxville. Pop. in 1830, 274; in 1840, 7,060; in 1850, 13,279.