I believe the water that feeds this well travells via an underground stream and runs from several wells that are set in dressed stone surrounds, the water runs from the wells on the surface for a few yards and then dissapears into what looks like a bomb hole, in the bottom of which is a pothole, the opening is quite narrow now but my father used to tell me that at one time it was much wider but was was narrowed on purpose to stop farm animals entering, apparrently a few years ago one local man travelled along the pothole for some distance by sending his dog in front tied to a rope or string. A group of archaeologist from a university did clear the mouth of the pothole about forty years ago when I was in my early teens, they said they would be back after a trip abroad, they asked us not to broadcast the fact that they were digging there and they would be back to ressume the dig. we did not see them again. I hope this is of interest to someone.(Eric Jones, Pen-y-cae)
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