Waltham - Miss Mary L. Butler, of Waltham, died Wednesday, September 12, 2007 at Newton-Wellesley Hospital. She was 89. Born in Waltham, a daughter of the late Sylvester and Irene (Rice) Butler, Mary worked for thirty years as a billing clerk for the Raytheon Corporation in Waltham. She was a graduate of Saint Marys High School. Mary was the sister of the late Joseph Butler and Paul Butler. She leaves one brother, John R. Butler and his wife, Jean, of Leominster and many nieces and nephews. A Funeral Mass will be held on Monday at 10 a.m. in Saint Marys Church, 133 School Street, Waltham Burial will be in Calvary Cemetery, Waltham. Visitation will be held from 8:30 to 9:30 a.m. Monday morning in The Joyce Funeral Home, 245 Main Street (Rte.20), Waltham. Memorial donations may be made to Saint Marys Restoration Fund.