PERRY COUNTY, situated in the central part of Alabama, and traversed by Cahawba river. Area, 936 square miles. Seat of justice, Marion. Pop. in 1830, 11.509; in 1840, 19,086; in 1850, 22,285.

MORGAN COUNTY, situated in the northerly part of Alabama, with Tennessee river on the north. Area, 720 square miles. Seat of justice, Somerville. Pop. in 1830, 9,062; in 1840, 9,841; in 1850, 10,125.

MONTGOMERY COUNTY, situated toward the southeast part of Alabama, with Alabama river on the northwest, and traversed by the Tallapoosa. Area, 900 square miles. Face of the country hilly; soil generally sterile. Seat of justice, Montgomery. Pop. in 1820, 6,604; in 1830, 12,694; in 1840, 24,574; in 1850, 29,711.

MONROE COUNTY, situated in the south part of Alabama, with Alabama river on the west. Area, 980 square miles. Face of the country even; soil sterile. Seat of justice, Monroeville. Pop. in 1820, 8,838; in 1830, 8,784; in 1840, 10,680; in 1850, 12,013.

MOBILE COUNTY, situated at the southwest corner of Alabama, with the gulf of Mexico on the south, Mobile bay and Texas river on the east, and traversed by Mobile river. Area, 2,250 square miles. Face of the country level; soil generally barren. Seat of justice, Mobile. Pop. in 1816, 1,300; in 1820, 2,672; in 1830, 3,071; in 1840, 18,741; in 1850, 27,600.

MARSHALL COUNTY, situated in the northeasterly part of Alabama, and traversed by Tennessee river. Area, 600 square miles. Seat of justice, Warrenton. Pop. in 1840, 7,553; in 1850, 8,846.

MARION COUNTY, situated on the west boundary of Alabama. Area, 1,144 square miles. Seat of justice, Pikeville. Pop. in 1830, 4,058; in 1840, 5,847; in 1850, 7,833.

MARENGO COUNTY, situated in the westerly part of Alabama, with Tombigbee river on the west. Area, 975 square miles. Face of the country hilly; soil generally barren. Seat of justice, Linden. Pop. in 1820, 3,933; in 1830, 7,742; in 1840, 17,264; in 1850, 27,831.

MADISON COUNTY, situated on the north boundary of Alabama, with Tennessee river on the south. Area, 760 square miles. Face of the country diversified; soil fertile. Seat of justice, Huntsville. Pop. in 1820, 17,481; in 1830, 27,990; in 1840, 25,706; in 1850, 26,327.

MACON COUNTY, situated toward the southeast part of Alabama, with Tallapoosa river on the northwest. Area, 970 square miles. Seat of justice, Tuskegee. Pop. in 1840, 11,247; in 1850, 26,898.