Piatt County, Illinois (Fanning's, 1853)
Gazetteer/Almanac
PIATT COUNTY, situated toward the east part of Illinois. Area, 440 square miles. Seat of justice, Monticello. Pop. in 1850, 1,606.
Fanning's Illustrated Gazetteer of the United States... (New York: Phelps, Fanning & Co., 1853), 290.