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.
There is a great hole or well near the river Suir, always filled with water, whose depth no man has yet fathomed. Near it is a castle, which in old times belonged to a powerful chief called Neal-mor. One day while his servants were saving the hay, a violent tempest of wind and rain came on, which quite destroyed the crop. Then Neal-mor was filled with rage, and he mounted his horse and drew his sword, and rode forth to the field ; and there he challenged the Lord God Himself to battle. And he swung his sword round his head and struck at the air, as if he would kill and slay the Great Invisible Spirit. On which suddenly a strange thing happened, for a great whirlwind arose and the earth opened, and Neal-mor, still astride on his horse and with his sword in his hand, was lifted high up into the air and then cast down alive into the great hole, called Poul-mor, which may be seen to this day, and the castle is still standing by the margin. But no trace of Neal-mor or his steed was ever again beheld. They perished utterly by the vengeance of God. But some time after his disappearance, a rude stone figure seated on a horse, was cast up out of the earth ; and then all men knew the fate of the terrible chief who had braved the wrath of God, for here was his image and the sign of his destruction. This stone figure is still preserved at the castle, and tradition says that if it were removed the whole castle would crumble to pieces in a single night and be cast into the Poul-mor.