...in chronology, a period of 19 years in which there are 235 lunations or synodic months, after which the Moon's phases recur on the same days of the solar year. The cycle was discovered by Meton (fl. 432 BC), an Athenian astronomer.
This area of Truthwall Common is rich with legends of the Otherworld: fairy folk, demons and devils. One story tells of how a local miner chanced upon a Fairy Feast at the circle and was bound in gossamer thread and left there all night; another tells of an encounter with the Devil himself on Carn Kenidjack, which dominates the horizon from the circle; and yet another tells of Pee Tregear who was piskey-led here and encountered the little folk. All these stories may be memories of the ancestors and spirits of the dead, for this whole area was formerly covered with prehistoric barrows, burial mounds and megalithic monuments.