The Pooka, rectè Púca, seems essentially an animal spirit. Some derive his name from poc, a he-goat; and speculative persons consider him the forefather of Shakespeare's "Puck". On solitary mountains and among old ruins he lives, "grown monstrous with much solitude," and is of the race of the nightmare. "In the MS. story, called 'Mac-na-Michomhairle', of uncertain authorship," writes me Mr. Douglas Hyde, "we read that 'out of a certain hill in Leinster, there used to emerge as far as his middle, a plump, sleek, terrible steed, and speak in human voice to each person about November-day, and he was accustomed to give intelligent and proper answers to such as consulted him concerning all that would befall them until the November of next year. And the people used to leave gifts and presents at the hill until the coming of Patrick and the holy clergy.' This tradition appears to be a cognate one with that of the Púca." Yes! unless it were merely an augh-ishka [each-uisgé], or Water-horse. For these, we are told, were common once, and used to come out of the water to gallop on the sands and in the fields, and people would often go between them and the marge and bridle them, and they would make the finest of horses if only you could keep them away from the sight of the water; but if once they saw a glimpse of the water, they would plunge in with their rider, and tear him to pieces at the bottom. It being a November spirit, however, tells in favour of the Pooka, for November-day is sacred to the Pooka. It is hard to realise that wild, staring phantom grown sleek and civil.
He has many shapes--is now a horse, now an ass, now a bull, now a goat, now an eagle. Like all spirits, he is only half in the world of form.