Pitt, William, ii. 316, 320, 324, 326, 328, 330, 336, 342; restored to power, 396, 418; determined to re-establish the former navigation laws, 419; his measures in 1804 and 1805 for restricting American commerce, iii. 44, 45; his coalition with Austria and Russia, 73; Burr expects support from, 235, 238; death of, 163, 211, 245; his patronage of young men, v. 264, 265. Pittsburg in 1800, i. 2; growth of, in 1816, ix. 157; steamboats built at, 172. “Plantagenet,” British seventy-four, at Fayal, viii. 201–207. Plattsburg, on Lake Champlain, military force at, in October, 1812, vi. 344; Dearborn’s campaign from, 360; plundered by British expedition in July, 1813, vii. 192; Wilkinson’s headquarters in March, 1814, viii. 25; fortified by Izard, 98, 99; garrison at, 100; British armament against, 101–105; battle of, 106–113; effect of battle in England, 112; saved by engineers and sailors, 218; ix. 236; effect of battle at London, Paris, and Ghent, ix. 35–37, 55; at Washington, 57. Plauché, ----, major of New Orleans militia, viii. 345. Plumer, William, senator from New Hampshire, ii. 160, 364, 405; Republican candidate for governor of New Hampshire, viii. 11. Plymouth town-meeting in January, 1809, vi. 414. Poland, v. 257. “Polly,” case of the, ii. 328, 340; rule established by case of, set aside, iii. 45. “Pomone,” British 38-gun frigate, ix. 64; extracts from her log, 66, 67; Decatur’s surrender to, 70. Population of the United States in 1800, i. 1; centre of, near Baltimore, 1; west of the Alleghanies in 1800, 3; of cities, 59; in 1810, v. 289; of the Union in 1817, ix. 154; movements of, 1800–1817, 154–157, 161, 163, 164. Porter, David, captain in U. S. navy, commands “Essex,” vi. 377; captures “Alert,” 377; returns to port, 378; sails again, 384; erects batteries on the Potomac in August, 1814, viii. 164; his cruise in the Pacific with the “Essex,” 175, 177; blockaded at Valparaiso, 179; attacked and obliged to surrender, 180. Porter, Moses, major of artillery, iii. 246; colonel of Light Artillery, brevet brigadier-general, commands artillery in Wilkinson’s expedition on the St. Lawrence, vii. 184; his opinion on moving against Montreal, 185; intended by Armstrong to command at Washington, viii. 122.