[14] 'Besides,' says Dr. Sullivan, 'the monastic bishop proper, who furnished the wandering Scotic bishops of the Middle Ages, there is a later development of a higher church organisation in the tribal bishop, who was a close approximation to a diocesan bishop. The tribal bishop was a bishop who had jurisdiction over the whole of a _Tuath_, and sometimes even a _Mór Tuath_. The growth of territorial jurisdiction is well marked by the prestige attached to the office--the bishop ranked in fact almost on a level with the chief, and was entitled to the same legal retinue. Many of the ancient dioceses, and some of the existing ones, _e.g._ Ross, Kilmacduagh, Kilfenora, represent ancient _Tuaths_, or tribe territories. Several deaneries were former dioceses, and are co-extensive with ancient _Tuatha_. [15] Dr. Sullivan warns me not to attribute too much influence to the Danish Church. 'The tribe-bishop,' he says, 'was a much earlier development, and proves the growth of diocesan jurisdiction and the consequent merging of the Irish Church in the Latin Church. The acceptance of the Roman time for celebrating Easter by the Irish Church and the constant intercourse between Ireland and the Continent had brought the Irish Church fully under Roman supremacy three and a half centuries earlier. What really took place in the early part of the twelfth century was the more complete adoption of the organisation of the Western Church, and of the principles of the canon law; and especially the granting of lands and charters to the Church in the same way as in feudal lands. The marriage of Irish princes with Saxon and other foreign princesses, and the growth of towns which helped to relax its rigid tribal system, did more than the Danish Church.' The chief towns were, however, of Danish origin. CHAPTER II. THE SCANDINAVIAN ELEMENT. [Sidenote: First appearance of the Northmen, 795.] Norwegian ships began to appear on the Irish coast in 795, one year after the destruction of the church at Lindisfarne. The islands were harried, Lambay being perhaps the first to suffer; everything of value was taken, and the hermits and anchorites were killed or carried away. Iona, where the greatest of Irish saints had founded a new Church, was burned or plundered in 802 and 806. About twelve years after their first visit the Scandinavians began to venture inland, sacking the monasteries, which contained such wealth as Ireland then possessed, and slaughtering the monks. The famous religious community at Bangor, in Down, was thus destroyed about 824. The first permanent settlement of the northern invaders was perhaps in the neighbourhood of Limerick. They had a fort at Cork before 848, and at Dublin before 852. There were also forts on Lough Foyle and at Waterford. The flat coast between Dublin and the borders of Meath lay open to a floating enemy, and early obtained the name of Fingal, or the land of the stranger. [Sidenote: Turgesius, 830.]