The Milesians should take a half portion of the land and the Dé Dananns should take the other. Amergin made both parties agree with binding oaths. But, too late, the Dé Dananns discovered that Amergin had tricked them. The half portion of mortal men was to be all the land above ground. The portion of the Dé Dananns was to be the land below the turf and rocks.
