SULLIVAN COUNTY, situated on the west boundary of New Hampshire, on the east bank of Connecticut river. Area, 530 square miles. Face of the country, hilly and mountainous; soil, fertile along the streams. Seat of justice, Newport. Pop. in 1830, 19,669; in 1840, 20,340; in 1850, 19,375.

STRAFFORD COUNTY, situated on the east boundary of New Hampshire with Salmon Falls river on the northeast. Area, 500 square miles. Face of the country, hilly or undulating; soil, good. Seat of justice, Dover. Pop. in 1810, 41,594; in 1820, 51,117; in 1830, 58,910; in 1840, 61,127; in 1850, 29,314.

ROCKINGHAM COUNTY, situated at the southeast corner of New Hampshire, with the Atlantic ocean on the southeast, and Piscataqua river on the northeast. Area, 695 square miles. Face of the country, diversified; soil, productive. Seats of justice, Portsmouth and Exeter. Pop. in 1810, 50,175; in 1820, 55,226; in 1830, 44,325; in 1840, 45,771; in 1850, 48,184.

MERRIMACK COUNTY, situated toward the south part of New Hampshire, and traversed by Merrimack river. Area, 816 square miles. Face of the country, undulating and hilly; soil fertile. Seat of justice, Concord, which is also the state capital. Pop. in 1830, 34,619; in 1840, 36,253; in 1850, 40,377.

HILLSBOROUGH COUNTY, situated on the southern boundary of New Hampshire, and traversed by Merrimack river. Area, 1,245 square miles. Face of the country mountainous and hilly; soil generally fertile. Seat of justice, Amherst. Pop. in 1810, 49,249; in 1820, 35,761; in 1830, 37,762; in 1840, 42,494; in 1850, 57,373.

GRAFTON COUNTY, situated on the western boundary of New Hampshire with Connecticut river on the west. Area, 1,740 square miles. Face of the country, mountainous and broken; soil productive. Seats of justice, Haverhill and Plymouth. Pop. in 1810, 28,462; in 1820, 32,989; in 1830, 38,691; in 1840, 42,311; in 1850, 41,343.

COOS COUNTY, situated at the extreme north part of New Hampshire, on the easterly side of Connecticut river. Area, 1,600 square miles. Face of the country mountainous and generally broken; soil in many parts productive in grain and pasturage. Seat of justice, Lancaster. Pop. in 1820, 5,549; in 1830, 8,390; in 1840, 9,849; in 1850, 11,713.

CHESHIRE COUNTY, situated at the southwest corner of New Hampshire, on the easterly side of Connecticut river. Area, 442 square miles. Face of the country mountainous and hilly; soil generally rocky, but productive and well watered. Seat of justice, Keene. Pop. in 1820, 45,376; in 1830, 27,016; in 1840, 26,429; in 1850, 28,344.

CARROLL COUNTY, situated on the easterly boundary of New Hampshire, with Squam and Winnipisiogee lakes on the west and southwest. Area, 550 square miles. Face of the country generally mountainous and hilly; soil varied, much of which is highly fertile. Seat of justice, Ossipee. Pop. in 1850, 20,157.