The most noted and most permanent of the Irish settlements in Britain was that of Argyleshire and the adjoining islands. The kings of Dál Riada, according to the Annals of Tigernach, did not take up their abode in that region until far on in the fifth century, A.D. 470. This, however, does not imply that the Irish migration to Scotland began at that time. It rather means that the Irish colonies of Argyleshire and the islands became subject at that time to the kings of the nearest territory in Ireland. There is no record known to me of the Irish migration to Galloway, the south-western angle of the Scottish mainland, a region formerly occupied by the Picts. Though the Norsemen settled in Galloway in a later age, a glance at the map will show that the place-names of Galloway are almost as purely Gaelic as those of any part of Ireland. Gaelic was the prevalent language of Galloway in the sixteenth century and continued to be spoken there in the eighteenth century. These Gaelic settlements on the western seaboard of Britain appeared to Sir John Rhys to be the remnants of a Gaelic population which, he thought, preceded the British or Brythonic conquest. There are stories of the Fiana and even of the heroes of the earlier Ulster cycle that reflect in tradition those raids on Britain which are recorded in Latin writings. As we approach the borderland of documentary history, the evidences are still more definite. The death of Niall of the Nine Hostages, king of Ireland, is assigned to the year 404. At the time of his death, he was at the head of an expedition in the English Channel, and he was slain on board ship by a Leinster prince. He was succeeded by his brother's son Nath-Í, commonly called Dathi in later writings. Nath-Í in turn met his death at the head of an oversea expedition in the year 429. He is said to have been killed by lightning in the Alps. At this time, the Roman Empire was making its final struggle in Gaul under Aetius "the last of the Romans," against the Visigoths who held all the southern parts from Italy to the Bay of Biscay, and the Franks and Burgundians who had occupied the parts along the Rhine. It does not seem likely that an Irish raid, in these circumstances, could reach the Alps, nor can we well imagine what it could expect to gain by such an inroad. The Alps are probably a circumstantial ornament to the story, and we may content ourselves with the main point that this Irish king, three years before St. Patrick's mission began, led a raiding expedition to Gaul and met his death there. The story contains an additional proof that the kings of Ireland, who reigned in Tara in those days, represented the ancient dynasty of Connacht. The remains of Nath-Í were brought back to Ireland and laid to rest in the ancient pagan cemetery of Cruachain, beside the royal burg of the Connacht kings. It was the old line of the kings of Cruachain that had now become kings of Ireland seated in Tara. There is another interesting piece of