O'KEEFE, MARY L. of Dorchester, March 21, 2011. Cherished daughter of the late Henry & Mary O'Keefe. Beloved sister of Kathleen. Dearest cousin of the late Charles, Janet & Jane along with many special other relatives & friends. Visiting hours will be held Thursday, March 24 from 4 to 8 PM at The Casper Funeral Home, 187 Dorchester St., SOUTH BOSTON. Followed by a Funeral Mass Friday at 10 AM At Marian Manor Chapel (Use Old Harbor Street Entrance) Interment at Mt. Calvary Cemetery.