Sidheog is a friendly fairy and Sidhean and Sheeaun are places where fairies live. Certain hills and forests which were thickly peopled with fairies in the early days can be identified by such names as Shean, Sheaun, and similar variations of the terms that are applied to haunted hills. There are "good people" and "bad people" who invade the privacy of those who dwell in mountain cottages and bring them blessings or treat them badly, as the case may be. At one time they were numerous up in these woods. The best known fairy, however, the busiest of them all, and an odd mixture of merriment, mischief, and malignity, is "Pooka," who is known in England, in Germany, and other places under the name of "Puck." Shakespeare describes him as "a merry wanderer of the night," who boasts that he can "put a girdle round about the earth in forty minutes." This capricious goblin is known to every child in the mountains, and stories are told of him in every cabin. Carrig-Peeka, the Pooka's home in a great rock, can be seen two miles west of Macroom. It overhangs the Sullane River near the ruins of one of the MacCarthy castles. This rock is well known as the place where Daniel O'Rourke started on his celebrated voyage to the moon on the back of an eagle, and for generations Pooka made it his headquarters and used to play all kinds of pranks upon the peasants in that neighborhood. There is a hideous kind of hobgoblin called a dullaghan who can take off and put on his head at will; in fact, people generally see him with that useful member under his arm or absent altogether, and on such an occasion it is well to pass on as quietly as possible without disturbing him. Sometimes giddy and frivolous bands of dullaghans have been seen in graveyards at midnight amusing themselves by flinging their heads at one another and kicking them about like footballs. Down in this neighborhood there is a little lake called Lough Gillagancan, which means "the Lake of the Headless Man," because they are in the habit of haunting it during the long winter nights and playing their ridiculous games there.