The farmer at Tregune Farm says he put the stone up himself in the last 20yrs. He calls it the 'Bull Stone' cause it's a good place to hide if you're being chased by one.
There are hut circles nearby and a medieval settlement.
I can not find any reference to this stone, and it is definately not the Tregune Menhir which stands in the middle of a field nearby. This one stands beside the road leading from Tregrenna to Tregune. It is about 5 ft high and has three sides. There are no signs of it being shaped by man and no holes where it may have been used as a gate post. The fact that it stands beside a track that leads onto open moor and important sites like the East Moor stone row makes me think it is not just another rubbing post.