This is the stone of William Williams, one of Shirley's Revolutionary War minutemen and it was repaired last year by Gravestone Services of New England. The company cleans and repairs historic gravestones and monuments throughout New England and the nation. They have preserved nearly 20,000 gravestones and monuments, including eight historic stones in Shirley. On Saturday March 9 at 2 p.m., Kai Nalenz will speak at the Shirley Historical Society Museum and will explain just how and why they do what they do. Gravestone Services of New England is a member of the Association of Gravestone Studies, Preservation Massachusetts, and the American Institute for Conservation of Historic and Artistic Works. This program is free. For more info, contact the Shirley Historical Society at 978-425-9328 or with any questions.