MASON COUNTY, situated on the northerly boundary of Kentucky, with Ohio river on the north. Area, 260 square miles. Face of the country hilly; soil near the streams fertile. Seat of justice, Washington. Pop. in 1810, 12,459; in 1820, 13,588; in 1830, 16,203; in 1840, 15,719; in 1850, 18,344.

MARSHALL COUNTY, situated in the west part of Kentucky, with Tennessee river on the northeast. Seat of justice, Benton. Pop. in 1850, 5,269.

MARION COUNTY, situated in the central part of Kentucky. Area, 276 square miles. Seat of justice, Lebanon. Pop. in 1840, 11,032; in 1850, 11,765.

MADISON COUNTY, situated toward the east part of Kentucky, with Kentucky river on the north. Area, 520 square miles. Seat of justice, Richmond. Pop. in 1820, 15,954; in 1830, 18,751; in 1840, 16,355; in 1850, 15,727.

LOGAN COUNTY, situated on the south boundary of Kentucky. Area, 600 square miles. Face of the country, undulating; soil, rich. Seat of justice, Russelville. Pop. in 1810, 12,123; in 1820, 14,423; in 1830, 13,002; in 1840, 12,615; in 1850, 16,581.

LIVINGSTON COUNTY, situated on the westerly boundary of Kentucky, and traversed by Cumberland river, and bounded by the Mississippi on the west, and the Tennessee on the south. Area, 330 square miles. Face of the country, generally level; soil fertile. Seat of justice, Salem. Pop. in 1810, 3,474; in 1820, 5,824; in 1830, 6,607; in 1840, 9,025; in 1850, 6,578.

LINCOLN COUNTY, situated in the central part of Kentucky. Area, 432 square miles. Face of the country hilly; soil fertile. Seat of justice, Stanford. Pop. in 1810, 8,676; in 1820, 9,979; in 1830, 11,602; in 1840, 10,187; in 1850, 10,093.

LEWIS COUNTY, situated on the northerly boundary of Kentucky, with Ohio river on the north. Area, 375 square miles. Face of the country, hilly; soil productive. Seat of justice, Clarksburgh. Pop. in 1830, 5,206; in 1840, 6,303; in 1850, 7,202.

LETCHER COUNTY, situated on the southeast boundary of Kentucky. Area, 200 square miles. Seat of justice, Whitesburgh. Pop. in 1850, 2,512.

LAWRENCE COUNTY, situated on the easterly boundary of Kentucky, with Big Sandy river on the east. Area, 650 square miles. Seat of justice, ---------- . Pop. in 1830, 3,900; in 1840, 4,730; in 1850, 6,281.