Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 43.
BLACKFORD COUNTY, situated toward the northeast of Indiana, and watered by Salamanic river, a branch of the Wabash. Area, 182 square miles. Seat of justice, Blackford. Pop. in 1840, 1,226; in 1850, 2,860.