Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 85.
CLINTON COUNTY, situated in the southern part of Illinois, and traversed by Kaskaskia river. Area, 480 square miles. This county is well-watered, and contains both timber and prairie lands. Seat of justice, Carlyle. Pop., in 1830, 2,330; in 1840, 3,718; in 1850, 5,139.