This is an Irish folk tale in the oral tradition, prefaced by a brief ethnographic note explaining that Knockfierna mountain in County Limerick is believed to be the dwelling of Donn, a fairy lord whose gathering of mist serves as a weather omen. The story follows Carroll O'Daly, a swaggering young man from Connacht known as "Devil Daly" for his contemptuous disregard of the fairy world, who encounters a farmer heading up the mountain at night to visit the "good people" and rashly decides to follow. Reaching the summit, O'Daly finds the mouth of the Poul-duve, a legendary pit said to be the entrance to a fairy castle inside the mountain, and heaves a large stone into it to mock whatever might dwell there — whereupon the stone flies straight back out and breaks his nose, rolls him down the mountainside, and leaves him bruised, bloodied, and black-eyed. The tale's central argument is precisely calibrated: neither cringing terror nor contemptuous disbelief is the right stance toward the fairies — what is owed is simple civil acknowledgment, and the cost of withholding it is physical humiliation. Distinctive to this telling is its comic-cautionary tone, treating the supernatural punishment not as tragedy but as a well-deserved corrective to male bravado, with O'Daly's transformation from swaggering sceptic to permanently chastened traveller framed as reasonable rather than pitiable.