Walsh, Joanna M. of Waltham, formerly of Lexington, May 17, 2010. Wife of the late Peter Hartman. Mother of Alexander M. Hartman and his fiance Sara Liebmann of Somerville. Sister of John Walsh of Bethesda, MD, Brian Walsh of Freetown, Hugh Walsh of Medfield, Molly McNamara of Lexington, Jim Walsh of Rockville, MD, and Paul Walsh of Newton. Joanna is also survived by many nieces and nephews. A Memorial Mass will be held Friday May 21 at Sacred Heart Church, 21 Follen Rd. Lexington at 10am. Relatives and friends are kindly invited to attend. Calling Hours at the Douglass Funeral Home, 51 Worthen Rd. Lexington Thursday 4 - 8 PM. Donations in her memory may be made to the Greater Boston food Bank, 70 South Bay Avenue, Boston, MA 02118. Private interment Mt. Pleasant Cemetery, Arlington.