- Lorraine, Lillian, 1892-1955--Portraits1
- MacDonald, Ballard, 1882-1935--Musical settings1
- Macfarlane, George--Portraits1
- Marches (Band)1
- Marches (Trumpet and piano)1
- Marches (Voice and piano)1
- Marches--1911-19201
- Marne, 1st Battle of the, France, 19141
- Marriage--Songs and music1
- Marsh, Mae, 1897-1968--Portraits1
- Maurice, Mary, 1844-1918--Portraits1
- McCrae, John, 1872-1918--Musical settings1
- Military music1
- Military music--United States1
- Military pensions--United States--Songs and music1
- Military readiness--Songs and music1
- Militia of Mercy (U.S.)--Songs and music1
- Minstrel music--Vocal scores with piano1
- Mons, 1st Battle of, Mons, Belgium, 1914--Songs and music1
- Morey, Harry--Portraits1