Reader Mike H writes:
I was out in the Northern Berkshires in Lanesborough, MA at my In-laws this past weekend. There is a 200 yard wide stone wall enclosed semicircle at the top of a hill with the open side overlooking a steep bank. A spring originates in the middle of the circle and flows through the opening. Enclosed is a photo of a nearby serpentine wall that is 50 yards long (possible Manitou Stone to the right?). Also a photo of the Turtle? formation located at the start of the spring with quartz.
The third photo is of another pile with a quartz boulder that has reddish quartz at the bottom.
The fourth photo shows some pure white quartz rocks in the otherwise grey wall. Close to the site is Seecum (Sachem) Brook, also called disappearing Brook because it flows underground and disappears at points.