"Under the government of these Norwegian princes [the Hy Ivar] the Isles appear to have been very flourishing. They were crowded with people; the arts were cultivated, and manufactures were carried to a degree of perfection which was then thought excellence. This comparatively advanced state of society in these remote isles may be ascribed partly to the influence and instructions of the Irish clergy, who were established all over the island before the arrival of the Norwegians, and possessed as much learning as was in those ages to be found in any part of Europe, except Constantinople and Rome; and partly to the arrival of great numbers of the provincial Britons flying to them as an asylum when their country was ravaged by the Saxons, and carrying with them the remains of the science, manufactures, and wealth introduced among them by their Roman masters. Neither were the Norwegians themselves in those ages destitute of a considerable portion of learning and of skill in the useful arts, in navigation, fisheries, and manufactures; nor were they in any respect such barbarians as those who know them only by the declamations of the early English writers may be apt to suppose them. The principal source of their wealth was piracy, then esteemed an honourable profession, in the exercise of which these islanders laid all the maritime countries of the west part of Europe under heavy contributions." _D. Macpherson, Geographical Illustrations of Scottish History (Quoted by J. H. Burton, History of Scotland, chapter 15, volume 2, foot-note)._ See, also, IRELAND: 9-10TH CENTURIES. NORMANS: A. D. 787-880. The so-called Danish invasions and settlements in England. "In our own English chronicles, 'Dena' or Dane is used as the common term for all the Scandinavian invaders of Britain, though not including the Swedes, who took no part in the attack, while Northman generally means 'man of Norway.' Asser however uses the words as synonymous, 'Nordmanni sive Dani.' Across the channel 'Northman' was the general name for the pirates, and 'Dane' would usually mean a pirate from Denmark. The distinction however is partly a chronological one; as, owing to the late appearance of the Danes in the middle of the ninth century, and the prominent part they then took in the general Wiking movement, their name tended from that time to narrow the area of the earlier term of 'Nordmanni.'" _J. R. Green, The Conquest of England, page 68, foot-note._ Prof. Freeman divides the Danish invasions of England into three periods: 1. The period of merely plundering incursions, which began A. D. 787. 2. The period of actual occupation and settlement, from 866 to the Peace of Wedmore, 880. 3. The later period of conquest, within which England was governed by Danish kings, A. D. 980-1042.