HAGERTY, Mary M. (Walsh) Of Westford, December 12, 2021. Beloved wife of the late Francis W. Hagerty. Loving mother of Mary H. Berner and her husband Arthur of Westford, Patricia H Blake and her husband Matthew of Bedford, NH and Michael W. Hagerty and Fiancee Sally Sites of Goffstown, NH. Grandmother of AJ and Jillian Berner, Kate Carter, Drew Blake, Sean and Daniel Hagerty, and the late Hannah Blake. Step-grandmother of Kim and Chris Berner. Step-great grandmother to Adam and Rebecca Berner. Visiting hours will be held Wednesday Dec. 15 ^th at the Douglass Funeral Home, 51 Worthen Rd. Lexington from 4pm to 7pm. A Mass of Christian burial will be celebrated Thursday Dec. 16 ^th at St. Agnes Church, Arlington at 10am. Relatives and friends are kindly invited. Interment at Belmont Cemetery.