Smith, William B. of North Chelmsford, formerly of Lexington, October 30, 2017. Son of the late Ernest C. Smith and Martha (Chubb). Brother Edith S. Engel and her husband David of Belmont and Richard H. Smith of Marblehead. Uncle of Richard W. Engel, Jonathan M. Engel, Christina S. Brenner, and Daniel R. Smith. Visiting hours will be held Sunday November 5 at the Douglass Funeral Home, 51 Worthen Rd. Lexington from 2pm to 5pm. Relatives and friends are kindly invited. A Memorial Celebration will be also held at a later date. Donations in his memory may be made to the First Parish Church, 7 Harrington Rd. Lexington, MA 02421. Private interment Westview Cemetery, Lexington.