At last they heard that the boars were ravaging a valley some miles away. Thither they followed, and after a hard struggle they killed the young boars one by one. But after a long pursuit Burstingboar vanished again, so completely this time that the host returned to Cornwall, thinking he must have left the land.
Scarcely had Arthur entered his palace when a breathless messenger rushed into the hall.
"Arise!" he cried. "The boar is ruining thy domain, trampling down towers and towns, uprooting trees, and killing men and cattle on all sides, and he is now coming over the mountains to do the same in Cornwall."
Then Arthur made this speech to his followers:
"Men of the Island of the Mighty, Burstingboar, the Wide-Waster, has slain many of our bravest men, but he shall never enter Cornwall while I live. You may do as you please; but for me, I will no longer hunt him, but shall meet him face to face."
Forthwith he posted men at various spots to prevent the creature from landing, and then rode up to the river's brink. As he arrived, suddenly, with a great rush, Burstingboar sprang out of the forest, and tried to cross on his way to Cornwall. But Arthur and his companions drove their horses into the water, and followed him, and somehow or other seized him by his fore feet as he scrambled up the bank, and flung him back into the river; and as he fell, Mabon, the son of Modron, caught the razor from behind one of his ears, and Kenneder the Wild snatched the scissors from behind the other.
Yet, even while they did this, Burstingboar upreared himself from the water, dashed up the river-bank, and disappeared. Then all the host followed, but they only came up to him when he had got well into Cornwall. Then a desperate fight began. By harassing him all day they managed to keep him from ravaging the land, and when he tried to get into Devon they were too many for him. Over the moors, down the coombs, up the hills, they chased him, till at length, being desperate, he turned, and made for the sea. In he plunged, but, though the pursuing horses stayed their feet at the water's edge, those two good hounds, Raceapace and Boundoft, who had followed him so long, could not hold themselves back, but plunged in after him into the waves. For long the heroes watched his course, with those two fierce dogs close behind him; but from that day to this nothing more has ever been heard of either Burstingboar or the two hounds.
Now, all the Impossible Tasks had been fulfilled, and joyfully did Prince Kilhugh ride to the giant's castle to claim his bride. But Thornogre Thistlehair looked on in gloomy silence as the marvels were spread out before him; he allowed himself to be shaven and combed; but though he could not refuse to give the Prince his daughter's hand, he openly said that he did it with no good will. Then the herdsman's son stood forth, and cried: "O giant, three and twenty of my brothers thou hast foully slain, and defrauded my father of his heritage. For these things thou shalt surely die by my hand to-day."
So he dragged him by his hair to the castle battlements, and, being very strong, he slew him there, and cut off his head. And the castle was given to the herdsman; but Kilhugh married fair Olwen, and they were happy ever after as long as they both lived.
From the "Mabinogion," A Welsh Romance. Thirteenth century A.D.