Found her on the 1900 Brooklyn, Queens, New York census (dist 272 img 3) as
Mary A. Watson age 15.
A very beautiful home wedding took place last night at 575 Leonard street when the Rev. Lincoln Hollister Caswell, of the Tabernacle M. E. Church, united in marriage Miss Mary Adelle Watson, daughter of Mr. and Mrs. John Watson, and Uriah A. Boch. The bridesmaid was Miss Hattie D. Boch, a sister of the groom, and Thomas F. Swain acted as best man. The bride was attired in white crepe de chine, over white taffeta and carried a bouquet of bridal roses. The bridesmaid wore champagne crepe de Paris over taffeta and carried pink roses. The ushers were Joseph C. Watson and A. Chester Smith, The house was very prettily decorated with potted palms, trailing vines and cut flowers. Following the ceremony the happy couple received the felicitations of the many relatives and friends assembled, and after the wedding supper left for an extended tour, which will include the World's Fair. On their return Mr. and Mrs. Boch will reside on Leonard street. - The Daily Standard Union October 13, 1904
Found her on the 1910 Brooklyn Ward 17, Kings, New York census (dist 387 img 12) as
Mary A. Boch age 25. Address: 575 Leonard St.
Found her on the 1930 Hempstead, Nassau, New York census (dist 127 img 2) as
Mary A. Boch age 45.