In the year when Ciaran the son of the Carpenter died, the same year when Tuathal Maelgariv was killed and the year when Diarmait the son of Cerrbel became king of all Ireland, the year 538 of our era in short, it happened that there was a great gathering of the men of Ireland at the Hill of Uisneach in Royal Meath.
In addition to the Council which was being held, there were games and tournaments and brilliant deployments of troops, and universal feastings and enjoyments. The gathering lasted for a week, and on the last day of the week Mongan was moving through the crowd with seven guards, his story-teller Cairide', and his wife.
It had been a beautiful day, with brilliant sunshine and great sport, but suddenly clouds began to gather in the sky to the west, and others came rushing blackly from the east. When these clouds met the world went dark for a space, and there fell from the sky a shower of hailstones, so large that each man wondered at their size, and so swift and heavy that the women and young people of the host screamed from the pain of the blows they received.
Mongan's men made a roof of their shields, and the hailstones battered on the shields so terribly that even under them they were afraid. They began to move away from the host looking for shelter, and when they had gone apart a little way they turned the edge of a small hill and a knoll of trees, and in the twinkling of an eye they were in fair weather.
One minute they heard the clashing and bashing of the hailstones, the howling of the venomous wind, the screams of women and the uproar of the crowd on the Hill of Uisneach, and the next minute they heard nothing more of those sounds and saw nothing more of these sights, for they had been permitted to go at one step out of the world of men and into the world of Faery.