That the Cwn Annwn are descendants of the wish-hound of Hermes, hardly admits of doubt. The same superstition prevails among all Aryan peoples, with details differing but little. The souls of the dying are carried away by the howling winds, the dogs of Hermes, in the ancient mythology as in surviving beliefs; on this follows the custom of opening the windows at death, so that the released soul may escape. In Devonshire they say no soul can escape from the house in which its body dies, unless all the locks and bolts are opened. In China a hole is made in the roof for a like purpose. The early Aryan conception of the wind as a howling dog or wolf speeding over the house-tops caused the inmates to tremble with fear, lest their souls should be called to follow them. It must be constantly borne in mind that all these creatures of fancy were more or less interchangeable, and the god Hermes was at times his own dog, which escorted the soul to the river Styx. The winds were now the maruts, or spirits of the breeze, serving Indra, the sky-god; again they were the great psychopomp himself. The peasant who to-day tells you that dogs can see death enter the house where a person is about to die, merely repeats the idea of a primeval man whose ignorance of physical science was complete.