Macaulay, Zachary, invitation to M. (1812), 1, 79
  and M., 135
McClellan, G.B., M. and presidential candidacy, 2, 427, 429-431
McClelland, Robert, and Coffin, 2, 164
McCormick, C.H., and reaper, 2, 501
McFarland, Asa, and M., 1, 201, 202, 217
McGowan, Samuel, on telegraph in Australia, 2, 321
McIlvaine, C.P., and Civil War, 2, 416
Madison, James, and War of 1812, 1, 66
Maggiore, Lago, M. at (1831), 1, 400
Magnet, Henry and, of M.’s telegraph, 2, 66-57
  See also Henry. 
Magnetic Telegraph Company, 2, 247
Main, William, and origin of Academy of Design, 1, 280
Mallory, ——­, bookseller at Boston, M. apprenticed to, 1, 24
Manrow, J.P., and company to operate telegraph, 2, 173
Marius in Prison, M.’s painting, 1, 82
Marlborough, Duke of, gambler (1829), 1, 307
Marseilles, M. at (1830), 1, 325
Marsh, ——­, of Wethersfield (1806), 1, 9
Marsiglia, Gerlando, and origin of Academy of Design, 1, 280
Mary, Princess, appearance (1814), 1, 137
Mason, ——­, proposed Mexican mission (1824), 1, 253
Mason, J.Y., from M. (1866) on presidential election, 2, 371
  and gratuity to M., 373
Mason, Samson, and telegraph, 2, 189, 194
Mathews, Charles, from M. (1814) offering a faroe, 1, 129
Maury, M.F., soundings of Atlantic plateau, 2, 343
Maverick, Peter, and origin of Academy of Design, 1, 280
Mead, F.J., from M. (1872) on Smith’s last attack, 2, 504
Melville, Lord, and American prisoner of war, 1, 126
Mexican War, M. on, 2, 270
Mexico, M. and proposed mission (1824), 1, 252-256
Meyendorf, Baron de, and M.’s telegraph, 2, 120, 147
  from M. (1840) on improvement, 153
Milan, M.’s impressions (1831), 1, 398
Military telegraph, M.’s plan, 2, 132-134
Miserere, M. on Allegri’s, 1, 345
Money, W.T., British consul at Venice, and M. at Recoaro (1831), 1, 396,
    397
Monks, M. on, 1, 352
Monopoly, M. on beneficent telegraph, 2, 444
  See also Consolidation. 
Monroe, James, M.’s portrait, 1, 222, 226
  and M., 227
  last levee, 262
Monroe, Mrs. James, drawing-room, 1, 227
Montaigne, M.E. de, M. on Essays, 1, 16
Montalivet, Comte M.C.B. de, and M.’s telegraph, 2, 105, 109
Morgan, J.J., to M. (1815) on death of Mrs. Allston, 1, 168
Morris, Tasker, & Morris, and experimental telegraph line, 2, 206
Morse, Arthur, from M. (1868) on return home, Thorwaldsen portrait, 2,
    464
  on death of brother, 466
Morse, C.W., birth, 1, 244
  childhood home, 298
  at New York (1844), 2, 219
  and farm, 269
  marriage, 289