There used to be two wells at Madron. Doom’s Well had its water diverted. St. Madron’s Well was used as a cure for nightmares, breathing disorders and limb-related problems. It was said that after you had bathed in the water of the well, you would have to sleep on St. Madron’s Bed, a stone situated nearby.
The best time to do such a ritual would be the first Thursday in May. However, if you had rickets, the first three Sundays in May would be fine. An afflicted child would have to be dipped in three times whilst the parents faced the sun and then passed around the well nine times from east to west. The parents should then tear a piece of the child’s clothing and hang it on a nearby tree in silence.
For further information, please read Haunted Britain by Antony D. Hippisley Coxe.