STEWART, Helen C. of Woburn, May 28, 2011 at age 80. Beloved mother of Kathleen Agresti of Woburn and Doreen Gilligan and her husband Mark of Billerica. Cherished grandmother of Kara Gilligan of Billerica. Dear sister of the late Richard Stewart. Funeral from the Barile Family Funeral Home, 482 Main St. (RT 28) STONEHAM Wednesday at 9am followed by a Funeral Mass celebrating Helen's Eternal Life in St. Patrick Church, 71 Central St. Stoneham at 10am. Family and friends are cordially invited to attend. Interment Holy Cross Cemetery, Malden. Please honor Helen by making donations in her memory to The American Diabetes Association, PO Box 31160, Hartford, CT 06150.