NOTES ON ANCIENT DEFENSIVE EARTHWORKS. 147 matter will be able to supply them for himself with the aid of ordnance maps. The distribution of these Chalk camps, their presence where naturally strong positions exist, and their absence where they do not, seem in themselves, apart from other evidence, to point to the conclusion that they are the work of a primitive people grouped into independent tribes or clans which inhabited adjacent districts. Their wars were with each other, hence they had no plan of defence on a broad scale. And their tools were so rude and inefficient that, having to deal with the com- paratively hard Chalk, they were compelled to economise labour by taking the utmost advantage of the work of natural agencies, even though it might often result in great inconvenience as regards the positions of their forts. I need not here dwell upon the general absence within these earthworks of any provision for a good supply of water, or to other considerations which all point to the conclusion that they were simply intended to be camps of refuge in which the women and children, flocks and herds of a tribe could remain secure for a day or two during the raid of some hostile clan or of piratical invaders. Popular tradition, in giving names to some of these old camps indicating the time of their supposed origin, has tended to lessen rather than to magnify their antiquity. Perhaps the most remarkable example of this is Cissbury, which instead of being, as its name would imply, the work of the South Saxon King Cissa, has been shown by General Pitt-Rivers to date from the Stone ages. In other cases the name "Caesars Camp" has been applied to ancient hill forts both on the Chalk and on other rocks, as with that on the Bagshot Sand at Aldershot ; with the entrenchment in Holwood Park, Kent, on the edge of the Lower Tertiaries ; or with the camp on the Chalk escarpment at Folke- stone. But in all such instances, as in the above examples, the name has been, in all probability, given in consequence of the discovery, within and around their areas, of Roman remains, the name "Caesar" being applied as that of the most famous of all Romans, who is also known as having visited South-eastern Britain. In Northern Britain there has been a corresponding tendency to suppose Agricola to have been the builder of large numbers of Roman camps. The Romans and more recent invaders of Britain seldom occupied permanently the sites of these hill-forts, though Roman