On the other hand, the Norwegian or Scandinavian kings of Dublin and other parts of Ireland also constantly maintained connections, both of friendship and relationship, with their countrymen in England and Scotland, as well as in the mother countries of Scandinavia. It might, indeed, sometimes happen that Scandinavian kings or Vikings, from Man or the Orkneys, attacked, nay even conquered for a time, the Norwegian kingdom of Dublin, particularly when the Norwegians in Ireland were at variance with one another. But in general the Scandinavian colonists in the British Isles appear to have stood or fallen with one another. Numerous Scandinavian warriors from England, Scotland, and the surrounding islands, fought now and then in conjunction with the Norwegians settled in Ireland, against the native Irish. But the Norwegian kings in Ireland frequently supported their friends in England and Scotland against the Anglo-Saxons and the Highland Scots, and at times won kingdoms there by force of arms. Mutual marriages, also, were frequently made, whilst Scandinavian merchants and Vikings, for instance, dwelt in Dublin at the court of the Norwegian kings. Thus the Norwegian prince Olaf Tryggvesön, after having been christened at Dublin, stayed there for some time with the Norwegian king Olaf Kvaran, and married his sister Gyda. Many accounts testify that the Norwegians in Ireland, at least in the cities, and especially Dublin, were powerful enough to maintain their language, and the rest of their Scandinavian characteristics, in spite of the Irish. The Icelandic bards, Thorgils Orraskjald and Gunnlaug Ormstunga, are expressly stated to have visited the court of the Norwegian kings in Dublin in the tenth and eleventh centuries, where they diverted the Scandinavian warriors with their national songs. Ancient Irish manuscripts contain proofs not only of the peculiar language, but also of the peculiar writing, of the Norwegians, or runes, which in Irish were called “Ogham na Loochlannach” or “Gallogham” (the Northmen’s, or strangers’, Ogham). Ogham was the name of a mode of writing then used by the Irish. There are also some traces of characteristic Scandinavian institutions among the Norwegians and Danes in Ireland. In an Irish poem of the early middle ages, about the Norwegian chief “Magnus the Great,” the Norwegians are called “the people with the twelve counsellors.” This leads us to think that the Norwegians, like the Danes in England, must have employed in their judicial proceedings a sort of jury, consisting of twelve men of repute, an institution so foreign and striking to the Irish, that they were led to characterize the Norwegians by it. It is at least quite certain that the Norwegians in Ireland, as the Irish chronicles admit, kept themselves entirely separate from the Irish with regard to their ecclesiastical institutions, and that they likewise had their own assize place in Dublin, which bore the Scandinavian name _Thing_. A document of