Under the Irish Sea, fifteen or sixteen miles south-west of the Calf, there is an enchanted isle. Long, long ago it was on the surface of the water – that was in the days when Manannan ruled Mann – but when Saint Patrick drove Manannan and his men from the island in the form of three-legged creatures, they came upon this isle. Manannan dropped it to the bottom of the sea, and they were seen no more.

Now it is home of Manannan Mac Lir, Son of the Sea, and he rules it as he used to rule Man...