The superstitious prejudice of the quarrymen in North Wales regarding Holy Thursday has been cited. It is not a reverential feeling, but a purely superstitious one, and has pervaded the district from ancient times. It has been supposed that Thursday was a sacred day among the Druids. There is a vulgar tradition (mentioned by Giraldus), that Snowdon mountains are frequented by an eagle, which perches on a fatal stone on every Thursday and whets her beak upon it, expecting a battle to occur, upon which she may satiate her hunger with the carcases of the slain; but the battle is ever deferred, and the stone has become almost perforated with the eagle's sharpening her beak upon it. There may perhaps be a connection traced between these superstitions and the lightning-god Thor, whose day Thursday was.