forms, dwelling in watery places and regarded as embodiments of water-spirits or guardians of the waters. In later tradition such monsters were said to have been imprisoned in lochs or destroyed by Celtic saints. As has been seen, a dragon's shriek on May-Eve made the land barren till Lludd buried it and its opponent alive after stupifying them with mead. They were placed in a cistvaen at Dinas Emreis in Snowdon, and long afterward Merlin got rid of them when they hindered Vortigern's building operations. Here the dragons are embodiments of powers hostile to man and to fertility, but are conquered by gods, Lludd and Merlin.24
Another story of a péist occurs in the Táin Bó Fráich. Fraoch was the most beautiful of Erin's heroes, and his mother was the divine Bebind, her sister the goddess Boann. Findabair, daughter of Ailill and Medb, loved him, but before going to claim her he was advised to seek from Boann treasure of the síd, which she gave him in abundance, while he was made welcome at Ailill's dún. After staying there for some time, he desired Findabair to elope with him, only to be refused, whereupon he demanded her of Ailill, but would not give the brideprice asked. Ailill and Medb therefore plotted his death, fearing that if he took Findabair by force, the Kings who sought her would attack them. While Fraoch was swimming in the river, Ailill bade him bring a branch from a rowantree growing on the bank, and swimming there, he returned with it, Findabair meanwhile admiring the beauty of his body. Ailill sent him for more, but the monster guardian of the tree attacked him; and when he called for a sword, Findabair leaped into the water with it, Ailill throwing a fivepronged spear at her. Fraoch caught it and hurled it back; and though the monster all the while was biting his side, with the sword he cut off its head and brought it to land. A bath of broth was made for him, and afterward he was laid on a bed. Then was heard lamentation, and a hundred and fifty women of the síde, clad in crimson with green head-dresses, appeared,
