Names
- Mansfield, John Worthington, 1849-1933.1
- Mansfield, Josie.1
- Mansfield, Mary Gertrude, 1854-1922.1
- Mansfield, Mary Hopkinson, 1827-1883.1
- Mansfield, Walter Damon, 1860-1926.1
- Matthews, Victoria Earle.1
- Matthews, Victoria.1
- May, Samuel J., Jr.1
- May, Samuel, Jr., 1810-1899.1
- McClellan, George B. (George Brinton), 1826-1885.1
- McClellan, R. Guy (Rolander Guy)1
- McDougal, John, 1818-1866.1
- Menken, Adah Isaacs, 1835-1868 (Spirit)1
- Mills, Harriet May, 1857-1935.1
- Mills, Harriet May.1
- Miner, Myrtilla Miner and the Miner school.1
- Miner, Myrtilla, 1815-1864.1
- Modern Spiritualists Society.1
- Montez, Lola, 1818-1861.1
- Morse, J. J. (James Johnson), 1849-.1