It is with the family of Pwyll, deities connected with the south-west corner of Wales, called by the Romans Demetia, and by the Britons Dyfed, and, roughly speaking, identical with the modern county of Pembrokeshire, that the earliest consecutive accounts of the British gods begin. The first of the Four Branches of the Mabinogi tell us how “Pwyll, Prince of Dyfed”, gained the right to be called _Pen Annwn_, the “Head of Hades”. Indeed, it almost seems as if it had been deliberately written to explain how the same person could be at once a mere mortal prince, however legendary, and a ruler in the mystic Other World, and so to reconcile two conflicting traditions.[330] But to an earlier age than that in which the legend was put into a literary shape, such forced reconciliation would not have been needed; for the two legends would not have been considered to conflict. When Pwyll, head of Annwn, was a mythic person whose tradition was still alive, the unexplored, rugged, and savage country of Dyfed, populated by the aboriginal Iberians whom the Celt had driven into such remote districts, appeared to those who dwelt upon the eastern side of its dividing river, the Tawë, at least a dependency of Annwn, if not that weird realm itself. But, as men grew bolder, the frontier was crossed, and Dyfed entered and traversed, and found to be not so unlike other countries. Its inhabitants, if not of Celtic race, were yet of flesh and blood. So that, though the province still continued to bear to a late date the names of the “Land of Illusion” and the “Realm of Glamour”,[331] it was no longer deemed to be Hades itself. That fitful and shadowy country had folded its tents, and departed over or under seas. The story of “Pwyll, Prince of Dyfed”,[332] tells us how there was war in Annwn between its two kings—or between two, perhaps, of its many chieftains. Arawn (“Silver-Tongue”) and Havgan (“Summer-White”) each coveted the dominions of the other. In the continual contests between them, Arawn was worsted, and in despair he visited the upper earth to seek for a mortal ally.