Which is no wonder at all,’ said Caeilte, ‘for no people of one generation or of one time are we: she is of the Tuatha Dé Danann, who are unfading and whose duration is perennial I am of the sons of Milesius, that are perishable and fade away.’ The exact distinction is between Caeilte, a withered old ancient–in most ways to be regarded as a ghost called up that Patrick may question him about the past history of Ireland–and a fairy-woman who is one of the Sidhe or Tuatha De Danann