This is where Hautville’s Quoit was thrown from, by Sir John Haut(e)ville (you can read more about this on the Hautville’s Quoit page). He was just rehearsing for a throwing match with the Devil, which he ended up winning by throwing a rock from Shute Shelve to Compton Bishop (about a mile and a half) – the Devil threw 3 furlongs shorter. (from Grinsell’s folklore book I think).
Sir John is apparently bured in Chew Magna church, where there’s an oak effigy of him.
This gentleman was remarkable for prodigious strength, as the Irish oak is probably intended to denote. Vulgar tradition informs us, that Edward the First having requested Sir John to shew him a specimen of his abilities, the knight undertook to convey three of the stoutest men in England to the top of Norton Tower [Norton Malreward is at the foot of Maes Knoll], situated in a neighbouring parish. Accordingly, taking one under each arm, and a third in his teeth, he proceeded on his task. The two in his arms, making some resistance, were squeezed to death, but the other was carried up without sustaining the smallest injury.
From ‘The Beauties of England’ by John Britton. Vol 13 pt 2, p628.