It is to be known that on the night of the Feast of Samhain the
doors separating this world and the next one are opened, and the
inhabitants of either world can leave their respective spheres and
appear in the world of the other beings.
Now there was a grandson to the Dagda Mor, the Lord of the
Underworld, and he was named Aillen mac Midna, out of Shi'
Finnachy, and this Aillen bore an implacable enmity to Tara and the
As well as being monarch of Ireland her High King was chief of
the people learned in magic, and it is possible that at some time
Conn had adventured into Tir na n-Og, the Land of the Young, and
had done some deed or misdeed in Aillen's lordship or in his
family. It must have been an ill deed in truth, for it was in a
very rage of revenge tha