Legend tells of a Mobberley farmer leading a milk-white mare to market in Macclesfield. Along the Edge, at a spot called Thieves Hole, an old man in grey stopped him and offered to buy the horse. The farmer declined, confident of a better price at market. The old man predicted that he would return that evening, unsold, to the same spot.
Failing to sell the horse, the farmer retraced his steps. The old man reappeared and repeated his offer, which was now accepted. Leading the farmer to a spot near Stormy Point, the old man waved a wand, uttered a spell, and revealed iron gates in the rock. Inside was a cavern filled with sleeping men and white horses. The old man, a wizard, paid the farmer from a chest and explained the sleepers would rise if England faced peril. He then sent the astonished farmer home.