SEMON, David A. Of Amherst, formerly of Lexington, November 13, 2009. Beloved son of Mary (Crocker) Semon and the late Ralph G. Semon. Dear brother of Jennifer J. Wallace and her husband Michael of North Dartmouth. Nephew of Florence Girgosian of Brighton. Loving companion of Rebecca Savage of Leverett. David will be missed by his extended family and many dear friends. Memorial services will be held at the First Parish Church, 7 Harrington Rd., Lexington, on Saturday, November 21 at 2 p.m. Relatives and friends are kindly invited to attend. Private interment Westview Cemetery, Lexington.