The arguments adduced in the preceding pages will probably be deemed sufficient to make out a strong case to show that these great circles were erected, at all events, after the departure of the Romans, and if this is so, it confines the field for discussion within very narrow limits. Either they must have been erected by the Romanized Britons before they were so completely Christianized as to be entirely weaned from their Pagan habits, or they were the works of the Saxons or Danes. We shall be in a better position to judge how far it is likely that the latter were the authors, when we have examined the rude stone monuments of Scandinavia or Friesland, from which countries the Northmen descended on our shores. When this is done, we shall probably come to the conclusion that, as they erected Dolmens as burying-places for their dead, and Menhirs or Bauta Stones and circles in their battle-fields, there is no improbability of their having done so also here. The question, however, is, did they erect these great 100-metre circles? These are unique, so far as I know; a class quite by themselves, and so similar, whether found in Cumberland or Derbyshire, or in Wilts or Somersetshire, that, with the probable exception of the Orkney group, they must be the work of one people, and also nearly of the same age. If, in fact, they do not mark the battle-fields to which I have attempted to ascribe them, they must mark something nearly approximating to them in date, and as nearly analogous in intention and purpose. SMALLER CIRCLES. [Illustration: 39. Rose Hill Tumulus. From the 'Archæologia,' vol. x.]