Norman Muller asks a question. If you have any information please leave a comment or email:
Jim Mavor describes hundreds of twenty-to-forty-ton boulders in Franklin, MA, leading to a swampy area. In Manitou he illustrates a line of these boulders on page 109, and says they are in an area called "Indian Fort." Might you know exactly where this site is located, or know someone who might?