She eventually married Aengus of the Tuatha de Dannan, but first he had to pick her out, in swan form, from a group of one hundred and fifty other swans at Loch Bel Dragon (Now Lough Muskry in the Galtees.) Having chosen correctly, he turned into a swan himself and they flew away, to the fortress of the River Boyne at Drogheda, singing beautiful music that put all its listeners asleep for three days and nights.