This section is from the book "Ancient Legends, Mystic Charms, And Superstitions Of Ireland", by Jane Francesca Wilde. Also available from Amazon: Ancient Legends, Mystic Charms, And Superstitions Of Ireland.
The peasants have the greatest dread of the fairy-stroke, and consider it the most dangerous indication of fairy hostility. When a person is struck, he becomes wholly insensible to external things, as if his soul had been taken out of him and carried away.
A farmer once began to build a barn on a fairy circle, to the great horror of the neighbours, who warned him of the danger; but he only laughed at their nonsense, and built and finished his barn on the fairy rath.
However, riding home one evening after sunset, he was suddenly " struck," and fell insensible to the ground. They carried him home and laid him on his bed, where he lay for several days, his eyes fixed and staring without any motion of the eyelids, and no indication of life remaining, except his colour, which never changed.
All the doctors came and looked at him, but could do nothing. There was no fracture nor injury of any kind to his frame ; so the doctors shook their heads and went their way, saying they would call again in a day or two. But the family objected to delay, and sent at once for the great fairy doctor of the district. The moment he came he threw herbs on the fire, when a fragrant smell filled the room like church incense. Then he pounded some herbs and mixed a liquid with them, but what the herbs were, no one knew. And with this mixture he touched the brow and the lips and the hands of the man, and sprinkled the rest over his insensible form. After this he told them to keep silence round him for two hours, when he would return and finish the cure. And so it happened, for in two hours the life came back to the man, though he could not speak. But strength came gradually ; and by the next day he rose up, and said he had dreamed a dream, and heard a voice saying to him, " Pull down the barnt for ill-luck is on it." Accordingly he gave orders to his men, and every stick and stone was carried away, and the fairy rath left free again for the fairies to dance on, as in the olden time, when they were the gods of the earth, long before men came to dispute their rights, and take possession of their ancient pleasure grounds-an indignity no high-spirited fairy could calmly endure. For in their councils they had decreed that the fairy rath, at least, should be sacred for all time', and woe to the man who builds his house thereon. An evil fate is on him and on the house for evermore. Down it must come, or the evil spell will never be lifted. There is no hope for it, for the most dangerous and subtle of all enemies is an angry fairy.
Nor should the paths even be crossed by work of human hand, which the fairies traverse from one palace to another. Their line of march must not be impeded. Finvarra and his men would resent such a gross insult to the royal fairy rights, and severely punish the audacious and offending mortal. Not even the Grand Jury would be allowed to interfere, for if they did, every man of them would be demolished in some way or other by fairy power.