PLANET—At Galena from St. Louis May 21, 1847.

PLOW BOY—Side-wheel; 275 tons; snagged above Providence, Mo., on Missouri River, 1853.

POMEROY—Minnesota River boat, Captain Bell 1861.

POTOSI—Collapsed flue at Quincy, Ill., October 4, 1844, killing two passengers; at Galena, Ill., from St. Louis, April 11, 1846.

PRAIRIE BIRD—Captain Nick Wall, in Galena, St. Louis & St. Peters trade 1846; at Galena April 11, 1846; at Galena, April 3, 1847, Captain Nick Wall, same trade; 213 tons burden; cost $17,000; sunk above Keithsburg, Iowa, 1852.

PRAIRIE ROSE—Stern-wheel; built at Brownsville, Pa., 1854; 248 tons; in St. Louis and St. Paul trade, 1855, Captain Maratta.

PRAIRIE STATE—(First)—One of the early boats on the Upper River; exploded boilers at Pekin, Ill., April 25, 1852, killing 20 of the deck passengers and crew.

PRAIRIE STATE—(Second)—Stern-wheel; 281 tons; 59 horse power; Captain Truett, St. Louis & St. Paul Packet, 1855.

PRE-EMPTION—Built by Harris Bros., of Galena; Captain D. Smith Harris, some time prior to 1852.

PROGRESS—Stern-wheel; built at Shousetown, Pa., 1854; 217 tons; Captain Goodell, at St. Paul, loading for St. Louis, 1857.