Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 188.
LEWIS COUNTY, situated on the easterly boundary of Missouri, with Mississippi river on the east. Area, 500 square miles. Face of the country, even; soil fertile. Seat of justice, Monticello. Pop. in 1840, 6,040; in 1850, 6,578.