Mauerheim, Aggie, 1890, '91, '92 _Soprano_ Mauerheim, Minnie, 1890, '91, '92 _Contralto_ Maul, Matilda J., 1905, '06, '07 _Mezzo-soprano, also accompanist_ Mayfield, Miss, 1888 _Mezzo-soprano_ Mead, Miss C., 1886 _Soprano_ Melvin, Will, 1894, '95, '96, '97 _Bass_ Melquiond, Clairess, 1905, '06 _Soprano_ Melquiond, Lester, 1906, '07 _Baritone_ Melquiond, Mrs. Rilly, 1905, '06 _Mezzo-soprano_ Merrill, Frank, 1898, 1903, '04 _Bass_ Merrill, George, 1898, '99, '00 _Baritone_ Merry sisters (2), 1897 _Soprano_ (children) Merzbach, Mrs., 1890, 1901 _Soprano_ Mertzfelter, Mrs., 1890 _Soprano_ Mesro, Mattie, 1895 _Soprano_ Michler, Mrs., 1896 _Soprano_ Michlosen, Mrs., 1908 _Soprano_ Milan, Laura, 1894 _Soprano_ Milan, Mrs., 1894 _Mezzo-soprano_ Millar, Grace, 1900 _Soprano_ Millar, Florence, 1903, '04 _Mezzo-soprano_ Millar, Anna, 1896, '97 _Contralto_ Millar, Bertha, 1903 _Soprano_ Millar, Evelyn, 1903 _Contralto_ Millar, Martha, 1898 _Contralto_ Millar, Rachael, 1898, 1902 _Soprano_ Minor, Mabel, 1907 _Soprano_ Monett, Emma, 1898, '99, '00 _Mezzo-soprano_ Moore, A.A. Jr., 1896 _Baritone-tenor_ Moore, Miss Carmen, 1896 _Soprano_ Moore, Bina, 1890, '91 _Soprano_ Morris, Mrs. H.C., 1895 _Soprano_ Moses, Clara, 1900 _Soprano_ Moss, Miss, 1887, '89, '90 _Soprano_ Muhler, Mr., 1898 _Tenor_ Mulgrew, Margaret, 1912 _Soprano_ Mullen, Miss, 1879, '80, '82, '85 _Soprano_ Muller, Mrs., 1908, '09 _Contralto_ Munch, Mrs. Emma, 1906, '07, '08, '10 _Soprano_ Munday, Evelyn, 1903 _Soprano_