All JPHS tours are free to the public. Tours start on Saturday at 11:00 a.m. Our tours last between 60 and 90 minutes and are canceled in case of heavy rain. No reservations are required, just meet the guide at the location listed.  A map showing the starting points of the walking tours can be found here. Once a district that only included the houses of Boston’s elite, the Pond later was put to industrial…