The Dam on Golden Brook

I’ve had this old glass plate negative hanging around and I finally got around to scanning it and adjusting the exposure to see what I had. I knew it was a dam but not where. At first, I thought it was the dam at Cobbett’s Pond, but there are differences that ruled it out. Eventually, a photograph by Baldwin Coolidge solved the mystery. His photograph of the mill on Golden Brook Road, clearly shows the dam. Of course, the same people who built this dam, would have also built the dam on Cobbett’s Pond, since they owned the water from the lake which was used to power the mill.  The only unsolved mystery now; who is the gentleman standing by the sluiceway?