formations of Tuan MacCairill could have their origin only in myth; and the wonder is that such a doctrine was accepted by Christian scribes. Tuan was Partholan's nephew and through centuries was the sole survivor of his race, which was tragically swept away by pestilence in one week for the sins of Partholan. Obtaining entrance to the fortress of a great warrior by the curious but infallible process of "fasting against" him, St. Finnen was told by his involuntary host that he was Tuan MacCairill and that he had been a witness of all events in Ireland since the days of Partholan. When he was old and decrepit, he found on awaking one morning that he had become a stag, full of youth and vigour; this was in the time of Nemed, and he described the coming of the Nemedians. He himself, as a stag, had been followed by innumerable stags which recognized him as their chief; but again he became old, and now after a night's sleep he awoke as a boar in youthful strength and became King of the boars. Similarly he became a vulture, then a salmon, in which form he was caught by fishers and taken to the house of King Caraill, whose wife ate him, so that from her he was reborn as a child. While in her womb he heard the conversations which went on, and knowing what was happening, he was a prophet when he grew up, and in St. Patrick's time was baptized, although he had professed knowledge of God while yet paganism alone existed in Ireland.3
The mythical données of this story are sufficiently obvious. Metamorphosis and rebirth have frequently been found in the myths already cited, and these were used by the inventors of Tuan MacCairill, the closest parallels to him being the two Swineherds and Gwion.4
The conversion of pagan heroes or euhemerized divinities to Christianity is sometimes related. When Oengus took Elcmar's síd,5 the latter's steward continued in his ofiice; and his wife became the mother of a daughter Ethne, afterward attendant to Manannan's daughter Curcog, who was born
