One day the friars went out to walk on the brink of the lake. There was a chair cut out of the rock about twenty feet from the brink, and what should they see seated in the chair but the big black boar. They did not know what was in it. Some of them said that it was a great water-dog that was in it, but they were not long in doubt about it, for it let a screech out of it that was heard seven miles on each side of it; it rose up then on its hind feet and was there screeching and dancing for a couple of hours. Then it leaped into the water, and no sooner did it do that than there rose an awful storm which swept the roof off the friar's house, and off every other house within seven miles of the place. Furious waves rose upon the lake which sent the water twenty feet up into the air. Then came the lightning and the thunder, and everybody thought that it was the end of the world that was in it. There was such a great darkness that a person could not see his own hand if he were to put it out before him.
The friars went in and fell to saying prayers, but it was not long till they had company. The great black boar came in, opened its mouth, and cast out of it a litter of bonhams. These began on the instant running backwards and forwards and screeching as loud as if there were the seven deaths on them with the hunger. There was fear and astonishment on the friars, and they did not know what they ought to do. The abbot came forward and desired them to bring him holy water. They did so, and as soon as he sprinkled a drop of it on the boar and on the bonhams they went out in a blaze of fire, sweeping part of the side-wall with them into the lake. "A thousand thanks to God," said the Father Abbot, "the devil is gone from us."
But my grief! he did not go far. When the darkness departed they went to the brink of the lake, and they saw the black boar sitting in the stone chair that was cut out in the rock.
"Get me my curragh," said the Father Abbot, "and I'll banish the thief."
They got him the curragh and holy water, and two of them went into the curragh with him, but as soon as they came near to the black boar he leaped into the water, the storm rose, and the furious waves, and the curragh and the three who were in it were thrown high up upon the land with broken bones.
They sent for a doctor and for the bishop, and when they told the story to the bishop he said, "There is a limb of the devil in the shape of a friar amongst you, but I'll find him out without delay." Then he ordered them all to come forward, and when they came he called out the name of every friar, and according as each answered he was put on one side. But when he called out the name of Friar Lucas he was not to be found. He sent a messenger for him, but could get no account of him. At last the friar they were seeking for came to the door, flung down a cross that he had round his neck, smote his foot on it, and burst into a great laugh, turned on his heel, and into the lake. When he came as far as the chair on the rock he sat on it, whipped off his friar's clothes and flung them out into the water. When he stripped himself they saw that there was hair on him from the sole of his foot to the top of his head, as long as a goat's beard. He was not long alone, the black boar came to him from the bottom of the lake, and they began romping and dancing on the rock.
Then the bishop enquired what place did the rogue come from, and the (father) Superior said that he came a month ago from the north, and that he had a friar's dress on him when he came, and that he asked no account from him of what brought him to this place.
"You are too blind to be a Superior," said the bishop, "since you do not recognise a devil from a friar." While the bishop was talking the eyes of everyone present were on him, and they did not feel till the black boar came behind them and the rogue that had been a friar riding on him. "Seize the villain, seize him," says the bishop.
"You didn't seize me yourself," says the villain, "when I was your pet hound, and when you were giving me the meat that you would not give to the poor people who were weak with the hunger; I thank you for it, and I'll have a hot corner for you when you leave this world."