Maryland, 14, 18, 23, 40, 50; banking laws, 106, 133; internal improvements, 133; and slavery, 161; and Know-Nothings, 243, 265; secession prevented, 275; Lee in, 300; against emancipation, 301. Mason, James M., 150, 215; commissioner to Europe, 286, 314. Mason, John Y., in Polk's Cabinet, 149, 215; Minister to France, 234; Ostend Manifesto, 235. Massachusetts, 3; conservative, 15; population, 39; cotton and wool manufacture, 42; bank capital and circulation, 45; tax valuation, 46; particularism and free trade to nationalism and protection, 54; banking laws, 106; for Scott, 182, 184; manufacturing, 187; shipping, 187; illiterates, 213; convicts, 213; and Sumner, 245; nullifies Fugitive Slave Law, 252. Matamoras, battle of, 154. Maysville Bill, 63, 64, 67. Meade, George Gordon, given command of the Army of the Potomac, 306; wins at Gettysburg, 306. Mechanics' Library of Lexington, Ky., fostered by Clay, 35. Mechanicsville, battle of, 297. Medill, Joseph, Republican leader, 255. Methodists, in West, 33; in South, 143; and slavery, 143, 144, 161, 165, 221; increase of membership, 145; in South, 218; strength of clergy, 220; members, 222; educational institutions, 222, 223. Mexican War, 135, 154. Mexico, West and, 25, 27; and England, 122, 126, 132, 135; Texas boundary, 148; Slidell's mission to, 153; war with, 154; desire for all, 157, 161, 247. Michigan, 22, 87; population, 90; Dutch repudiated, 106; Oregon and Texas, 132; made State, 198; Indians removed, 199; Republican party organized, 241. Michigan Central Railroad, 192. Middle States, 6, 13, 14; and Jackson, 17, 18, 22; labor scarce in, 30, 40; banks, 45; literature, 52, 53, 54, 55, 68, 74, 83, 84, 93; poor wheat crop, 101; Texas and Oregon, 127; abolition societies in, 162. Minnesota, 87, 89; made State, 198; Indians removed, 199. Mississippi, and Indians, 8, 87; and Jackson, 72; population, 89, 90; debt and income, 98; internal improvements, 98; debts of, repudiated, 106; "slavery a blessing," 119; Van Buren and Texas, 128; California and slavery, 175; secession of, 271, 313. Mississippi River, 87; canal feeders, 90; Commodore Foote on, 293; held by Federals, 307. Mississippi Valley, 2, 11, 21; for Texas and Oregon, 25; value of exports, 29, 36; immigration to, 90; Germans in, 91; cotton belt, 135, 198; growth and power, 199. Missouri, and Clay, 21, 22; the bank, tariff, and internal improvements, 22; horse-racing, 32, 37, 40; Germans in, 91; for Van Buren, 111; emigration from, to Oregon, 127, 131; Pacific Railroad, 238; and Kansas-Nebraska Bill, 238; and Kansas, 245, 265; secession of, prevented, 275; held by Federals, 313. Missouri Compromise, repealed, 239; Dred Scott decision, 247. Missouri Valley, in plantation belt, 138. Mobile, Ala., blockade-running from, 313; taken by Farragut, 321.