And with regard to the Swallow Falls, I remembered only too well her telling me, on the night of the landslip, the Welsh legend of Sir John Wynn, who died in the seventeenth century, and whose ghost, imprisoned at the bottom of the Falls on account of his ill deeds in the flesh, was heard to shriek amid the din of the waters. On that fatal night she told me that on certain rare occasions, when the moon shines straight down the chasm, the wail will become the art of non conform agonised shriek. I had often wondered what natural sound this was which the art of non conform afford such pabulum to my old foe, Superstition. So one night, when the moon was shining brilliantly-so brilliantly that the light seemed very little feebler than that of day-I walked in the direction of the Swallow Falls. Being afraid that I should not get much privacy at the Falls, I started late.