Louisiana, the name, 104; La Salle's colony, 109, 123 (_note_); Iberville's colony, 118; under Crozat, 125; under Law, 126; settlements begun, 127; ceded to Spain, 163; upper settlements, 166; lower settlements, 167; ceded to the United States, 174; settlements and population in 1803, 176-183; a State, 214. Louisville founded, 168. Mackenzie, Alexander, discovers the Mackenzie River, 138; reaches the Pacific, 139. Mandan tradition, 39 (_note_). Marco de Niza explores New Mexico, 32, 39 (_note_). Marquette, Fr. James, goes to Lake Superior, 78, 80 (_note_); goes with Joliet to find the Mississippi River (_see_ Joliet). Marshall, James W., discovers gold in California, 272. Mendoza, Antonio de, sends explorers into New Mexico, 32. McCormick, Cyrus H., his reaping-machine, 327. Meramec lead-mines, 182. Mexico, conquest of, 5; an historic initial-point, 7. Mexico, war with her, 250 (_note_); it is unpopular in the North, 251 (_note_); peace and its results, 263. Minnesota explored by Hennepin, 105-107; by Carver, 150-152; posts in, 183; by Pike, 198; by Nicollet and Fremont, 234, 241 (_note_); admitted to the Union, 307. Mississippi River, The, nearly discovered, 10; De Soto finds it, 16; name, 17 (_note_); the Sioux describe it, 78, 80 (_note_); acquires a first importance with the French, 82; fables about, 89; explored by Joliet and Marquette, 85-92; by La Salle, 103, 104. Mississippi Territory formed, 167. Missions in New Mexico, 37; in California, 60-64, 66 (_note_); on Lake Huron, 74, 75; Lake Superior, 77, 78, 79; Oregon, 233 (_note_), 238, 240; Texas, 246 (_note_); Kansas, 293. Missouri, settlements in, 1819, 219; struggle over her admission as a State, 223-227; her growth, 228. Missouri Compromise, the, 226; set aside, 292, 294 (_note_). Missouri River first mentioned, 89, 92 (_note_); its sources unknown, 1783, 162, 168 (_note_), 185, 191 (_note_). Monroe Doctrine enunciated, 231, 233 (_note_). Montana, 323, 325 (_note_). Monterey visited, 59; mission at, 61; name, 66 (_note_). Montezuma, 48, 52 (_note_). Mormons as soldiers, 253; rise of the sect, 268 (_note_); decide to go to Salt Lake, and why, 266; their city, 266, 268 (_note_); their growth, 267; and creed, 267; in California, 273, 275 (_note_). Mormon Diggings, 273, 274, 275 (_note_). Moscoso, Luis de, succeeds De Soto and saves his men, 17 (_note_), 18. Mount St. Elias discovered, 141. Natchez Indians, 123, 124.