The Celtic Twilight, by William Butler Yeats, [1893, 1902], at sacred-texts.com
IN the dim kingdom there is a great abundance of all excellent things. There is more love there than upon the earth; there is more dancing there than upon the earth; and there is more treasure there than upon the earth. In the beginning the earth was perhaps made to fulfil the desire of man, but now it has got old and fallen into decay. What wonder if we try and pilfer the treasures of that other kingdom!
A friend was once at a village near Sleive League. One day he was straying about a rath called 'Cashel Nore.' A man with a haggard face and unkempt hair, and clothes falling in pieces, came into the rath and began digging. My friend turned to a peasant who was working near and asked who the man was. 'That is the third O'Byrne,' was the answer. A few days after he learned this story: A great quantity of treasure had
been buried in the rath in pagan times, and a number of evil faeries set to guard it; but some day it was to be found and belong to the family of the O'Byrnes. Before that day three O'Byrnes must find it and die. Two had already done so. The first had dug and dug until at last he had got a glimpse of the stone coffin that contained it, but immediately a thing like a huge hairy dog came down the mountain and tore him to pieces. The next morning the treasure had again vanished deep into the earth. The second O'Byrne came and dug and dug until he found the coffer, and lifted the lid and saw the gold shining within. He saw some horrible sight the next moment, and went raving mad and soon died. The treasure again sank out of sight. The third O'Byrne is now digging. He believes that he will die in some terrible way the moment he finds the treasure, but that the spell will be broken, and the O'Byrne family made rich for ever, as they were of old.
A peasant of the neighbourhood once saw the treasure. He found the shin-bone of a hare lying on the grass. He took it up; there was a hole in it; he looked through the hole, and saw the gold heaped up under the ground. He hurried home to bring a spade, but when he got to the rath again he could not find the spot where he had seen it.