Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 207.
MARION COUNTY, situated on the easterly boundary of Missouri, with Mississippi river on the east. Area, 425 square miles. Seat of justice, Palmyra. Pop. in 1830, 4,837; in 1840, 9,623; in 1850, 12,230.