 Mahle, John H. (1) |
| Mahony, Thomas F. (1) |
| Mansion, Joseph (1) |
| Maretti, Lelio (1) |
| Matera, Fran (1) |
| McCloskey, William George, 1823-1909 (1) |
| McDonald, David J. (David John), 1902-1979 (1) |
| McGovern, George S. (George Stanley), 1922- (1) |
| McLeod, J. C. (1) |
| McNamara, Robert Francis, 1910- (1) |
| Meagher, Thomas Francis, 1823-1867 (1) |
| Meany, George, 1894-1980 (2) |
| Merrick, Mary Virginia (1) |
| Milik, J. T. (Jozef Tadeusz), 1922- (1) |
| Mitchel, John, 1815-1875 -- Correspondence (1) |
| Montavon, William Fredrick, 1874-1959 (1) |
| Morgan, J. Pierpont (John Pierpont), 1837-1913 (1) |
| Morrell, Louise Drexel, 1863-1945 (1) |
| Moss, Frank (1) |
| Muldoon, Peter James, 1862-1927 (1) |
| Murray, Philip, 1886-1952 (1) |
| Murray, Philip--correspondence (1) |
| Muski, Edmund (1) |
| Newton, William L. (William Louis), b. 1894 (1) |
