Revolutionary Westchester 250, Warner Library, and The Historical Society presentRevolutionary Tarrytown: Traitors and Spies, Patriots and Allies, British Boats and Hessian Ghosts!, with Dr. Erik Weiselberg, Principal Historian of Revolutionary Westchester 250. Contact Maureen Petry at mpetry@wlsmail.org with the subject "Revolutionary Tarrytown registration" for a Zoom invite.