Just realised who "Malcy" may be. I think he will knows much more about the stone as it will be on his land- I think or Beachmore, but my dad may know stories(apparently most know him) or my granny, who is a local.
I'm a local lass from the west road, but the family may know more. Especially about the "brownie". I've heard that. But my granny did lives close to the stone, then in the village more perm.
Could look in to it - but Malcy will know more!