sadly the mansion you are talking no longer exists. it was off of tunk hill road (route twelve) but the way to access it by car was to go up field hill road in clayville. the access road from route twelve still exists its just after old plainfiled pike but as i said the mansion is gone. the mansion you are talking about was called Joslyn Estate or Joslyn Plantation. The Joslyns were a rich family around the time of the scituate resivoir's conception and building, they lost much of their property and several businesses to the reservoir. The mansion was a frequent hangout of teens who grew up on route 12, and on franklin and adjacent roads. the mansion was intact for a while but with most sites frequent visitors took its toll and eventually the state locked the main house. the barn and the auxillary building were still accessible but eventually became unsafe with most people fearing that they'd fall through the floor, my step sisters even has stories of being forced to walk first across any floor because she was the heaviest and if it supported her than it would be safe for the others to cross over. in the early nineties a local man took it upon himself to become the "guard" for the estate and started sitting outside of it with a bebe gun and wouldn't think twice about firing on tresspassers despite being one himself. about seven years ago the state decided that they no longer wanted to deal with the house and its unwanted visitors and demolished the house and turning the land over to the providence water board. i haven't been to the house, i was too young at the time i lived on route twelve and too young at the time of demolition, but my step sisters frequented the place and have supplied me with many stories about visiting it.