Mary I. (Morgan) True, age 87, died Sunday, March 8, 2015 at Life Care Center of Plymouth. She was the beloved wife of the late Merle B. True to whom she was married 49 years. Born in Billerica, January 6, 1928, she was the daughter of the late Cyrus and Nellie (Fayton) Morgan. Mary, a graduate of Howe High School in Billerica, worked in the cafeteria in the old Schraffts Building in Charlestown for 10 years. Mary loved her church, the First Parish Unitarian Church of Billerica where she taught Sunday school, ran bake sales and suppers. She was a big supporter of all church activities. She also enjoyed working the polls on election days and taking census data for the town of Billerica. Mary was a lifelong resident of Billerica until she moved to Plymouth with her son and daughter. She is survived by her son, Robert True and his wife, Jennifer, of Plymouth, her daughter, Patricia M. True of Plymouth and her loving granddaughter, Emily Anne True, of Lowell.