MASON O'BRIEN, Frances T. (Fitzgerald). In Dorchester, November 4th. Loving mother of John T. Mason of Canada and Brian F. Mason of Florida. Sister of Mary Nutting of Idaho, and the late Kathleen Small and George Fitzgerald. Survived by 10 grandchildren and 6 great-grandchildren.Visiting hours in the Murphy Funeral Home,1020 Dorchester Ave., DORCHESTER, Thursday 4-8 P.M. with a Memorial Service at 7 P.M. Interment private. Late volunteer for the Kit Clark Senior Center and Generations Teacher's Assistant Program at the Mather and Russell Public Schools.