Clark, Elizabeth A. "Betty" (Healey) of Arlington May 11. Beloved wife of the late Lawrence Clark. Sister of the late Margaret "Peggy" Fitzgerald and Norma Mahoney. Also survived by her nieces and nephews. Relatives and friends are invited to a memorial mass on Friday May 18, 2012 at 5:00pm in St. Camillus Church , Concord Turnpike, Arlington. If desired expressions of sympathy may be made in Betty's memory to the MSPCA 350 South Huntington Avenue, Jamaica Plain, MA 02130. Betty was a teacher at the Mt. Auburn Hospital School of Nursing for many years. To send a condolence visit, devitofuneralhomes.com