The John Downs House, an 18th Century saltbox at 139 North Street, Milford will be open to the public on Thursday, July 20.

Tim Chaucer, historian and Milford Preservation Trust board member, will portray Joseph Plumb Martin, who was a resident of Milford and who wrote his memoirs about serving in the Continental Army.

The program will begin at 6:30 p.m. and is free; light refreshments will be served.