VI.

Confined to the coast, too, are those stories of phantom ships and phantom islands which, too familiar to merit illustration here, have their origin in the mirage. That they also touch the ancient mythology is undoubted; but their source in the mirage is probably true of the primeval belief as well as of the medieval, and that of our time. The Chinese also have the mirage, but not its scientific explanation, and hence of course their belief in its supernatural character is undisturbed.

## CHAPTER IV.

Grotesque Ghosts--The Phantom Horseman--Gigantic Spirits--The Black Ghost of Ffynon yr Yspryd--Black Men in the Mabinogion--Whirling Ghosts--Antic Spirits--The Tridoll Valley Ghost--Resemblance to Modern Spiritualistic Performances--Household Fairies.