While I was snooping around..relative to the
Berry Excelsior Mill....(McDude) I stumbled on this: Model Rail Roaders seem to be interested enough to "Model" ..in
"fine scale"...this Mill..and other buildings around Wolfeboro, And, additional text provides... more History.
What's interesting to me is....with all the historical narratives you run across in books about any topic...after awhile...there is mostly old narrative that you've seen before...OK..That solidifies that part....BUT..
Sometimes you find NEW tidbits that help fill in the Real Story.

NB
http://www.besttrains.com/products_1008.html
BTW: When I visited the Berry Mill in about 1970, it was in late winter..maybe March. There was no discernible heat in the building. There was a small office..with glass windows looking out at the shop. There was a lady in there who I presumed was the
office staff. I'm sure the office was heated.