Aw.... nobody ever runs around Greenville or Mason? (can't think why not!
) Ok...
the mill pond is one side of the mill pond in Greenville, along River Rd (which becomes Highbridge in New Ipswich).
The building... is Uncle Sam's boyhood home in Mason. Yes, he was indeed a real person, and he was from NH. He grew up in Mason before he became a meat packer. The house is privately owned, but there's a historical marker in front of it.