Names
- Mansfield, Mary Hopkinson, 1827-1883.1
- Mansfield, Walter Damon, 1860-1926.1
- Marshall, Doug.1
- Masó, Bartolomé.1
- McCaskey, Douglas.1
- McCaskey, William.1
- McClellan, George B. (George Brinton), 1826-1885.1
- McClellan, R. Guy (Rolander Guy)1
- McConkey, William, Jr.1
- McDermott, James.1
- McDougal, John, 1818-1866.1
- McDowell, Andrew, 1757-1843.1
- McKinley, William, 1843-1901.1
- McLane, Louis, 1786-1857.1
- Meigs, Josiah, 1757-1822.1
- Menken, Adah Isaacs, 1835-1868 (Spirit)1
- Miles, Matthew P.1
- Miles, Nelson Appleton, 1839-1925.1
- Mitchill, Samuel Latham, 1764-1831.1
- Modern Spiritualists Society.1