There's no description, but the
photo of a millstone makes for a dramatic image.
The stone is sickle cut, and has been turned into a memorial to Jean Mallett's windmill, 1704-1747
(I think - its not totally clear due to the angle the photo was taken at). I'll have to find out
where that mill was!
The millstone is at Powderhouse Square in Somerville, Massachusetts. It commemorates the mill
which still exists (in the form of a powder house) in nearby
Sickle cut millstone photo - Somerville, Massachusetts