His will is recorded in Cranston, Aug. 1776 (Council and Probate Records, vol. 2, p. 97), and names wife Elizabeth, son-in-law Edward Hawkins, daughter Ellis [Alice] Hawkins, son Asa Sprague.
Benjamin Sprague, Jr., of Cranston, yeoman. Will dated 2 Aug 1776, proved 12 Oct 1776, pps. 97-99. Wife Elizabeth. Son Asa Sprague. Daughter Ellis Hawkins wife of Edward Hawkins. Witnesses: Freelove Field, Marcy Dexter and Zuriel Waterman.