There has been much arguing to and fro of the question as to the respective shares taken by Danes and Norwegians in the Viking movement. That of the Swedes can fortunately be determined with a good deal more certainty. The Swedes were for the most part interested only in Eastern Europe and there by way of trade rather than of battle: we learn from runic inscriptions and other sources that some Swedes did visit England and the West, but these visits were due to individual rather than national activity. The question as between Dane and Norwegian has been to some extent made more difficult of settlement through the national prejudices of Scandinavian scholars; e.g. Danes for the most part decide in favour of the Danish origin of Rollo of Normandy, while Norwegians decide in favour of his Norwegian birth. Such differences of opinion are unfortunately only too often possible owing to the scantiness of the material upon which we have to base our conclusions. Medieval chroniclers were for the most part unable or unwilling to distinguish between Danes and Norwegians; they were all alike 'Nordmanni' to them and the term 'Dani' is practically interchangeable with it. The vagueness of their ethnographical knowledge is manifest when we find the Norman Dudo at the beginning of the 11th century tracing back the Dani (or Daci) to an original home in Dacia. The Irish annalists did, however, draw a very definite distinction between Norwegians and Danes--Finn-gaill and Dubh-gaill as they called them, i.e. White and Black Foreigners respectively[2]. They seem never to confuse them, but exactly on what grounds they gave them their distinguishing epithets it is now impossible to determine. They do not correspond to any known ethnographical differences, and the only other reasonable suggestion which has been offered is that the terms are used to describe some difference of armour or equipment as yet unknown to us. The Irish annals also distinguish between Daunites or Danes and Lochlanns or men from Lochlann, i.e. Norway; but again the origin of the term Lochlann as applied to Norway is obscure. The writers of the Anglo-Saxon Chronicle seem to use the term _Norðmenn_ very definitely of Norwegians, just as Alfred does in his translation of Orosius, but the term _Dene_ came to be used more vaguely and uncertainly. It is only very rarely that the chroniclers vouchsafe us precise information as to the home of any particular group of Viking raiders. We have already mentioned the presence of Norwegians from Hörðaland in England at the very opening of the movement[3]: once we hear of 'Westfaldingi,' i.e. men from Vestfold in South Norway, in an account of attacks on Aquitaine, and in one passage the Vikings are called 'Scaldingi,' but it is disputed whether this means Vikings who had been quartering themselves in the valley of the Scheldt, or is a term applied to the Danes from the name of their royal family, viz. the Skjöldungar[4].