Mary T. Murphy, 90 years, died December 30 at Bear Hill Nursing Center in Wakefield where she had been cared for since 2011. Mary was the daughter of Jeremiah and Hannah Murphy of Arlington. A graduate of Salem State and Boston Colleges, she was a teacher and elementary school principal in the Arlington Public Schools for 40 years. She is survived by Mary-Jane and John Beach of Yarmouthport, John Donelan of Middleton, Mark and Kelly Donelan of Danvers, Nancy and Charles Sabanty of Danvers, Susan and Dan Burke of Malden, Gael and Robert Tarleton of Seattle WA and Karen Donelan and Philip Amrein of Belmont, as well as 13 great nieces and nephews and 6 great great nieces and nephews. Visitation will be held in the Brown & Hickey Funeral Home 36 Trapelo Road Belmont on Saturday Jan 5th from 9:30 - 10:30 AM. Followed by a service of remembrance 10:30 AM. Relatives and friends invited. Burial will be private. Donations in Mary's memory may be made to a children's charity of your choice.