Gaul, the son of Morni, attended Lathmon into his own country, after his being defeated in Morven, as related in the preceding poem. He was kindly entertained by Nuäth, the father of Lathmon, and fell in love with his daughter Oithona. The lady was no less enamoured of Gaul, and a day was fixed for their marriage. In the meantime Fingal, preparing for an expedition into the country of the Britons, sent for Gaul. He obeyed, and went; but not without promising to Oithona to return, if he survived the war, by a certain day. Lathmon too was obliged to attend his father Nuäth in his wars, and Oithona was left alone at Dunlathmon, the seat of the family. Dunrommath, lord of Uthal, supposed to be one of the Orkneys, taking advantage of the absence of her friends, came, and carried off, by force, Oithona, who had formerly rejected his love, into Tromáthon, a desert island, where he concealed her in a cave.
Gaul returned on the day appointed; heard of the rape, and sailed to Tromáthon, to revenge himself on Dunrommath. When he landed, he found Oithona disconsolate, and resolved not to survive the loss of her honour. She told him the story of her misfortunes, and she scarce ended, when Dunrommath, with his followers, appeared at the further end of the island. Gaul prepared to attack him, recommending to Oithona to retire, till the battle was over. She seemingly obeyed; but she secretly armed herself, rushed into the thickest of the battle, and was mortally wounded. Gaul pursuing the flying enemy, found her just expiring on the field: he mourned over her, raised her tomb, and returned to Morven. Thus is the story handed down by tradition; nor is it given with any material difference in the poem, which opens with Gaul's return to Dunlathmon, after the rape of Oithona.
