encroaching Celts, down to the prosecution of the middle ages, may have driven continual streams of colonists in the same direction, this would account for all the phenomena we find, provided we may ascribe that modern date to the Algerian examples which to me appears undoubted.
It is hardly probable, however, that the Aquitanians would have sought refuge in Africa unless some kindred tribe existed there to afford them shelter and a welcome. If such a race did exist, that would go far to get rid of most of the difficulties of the problem. We are, however, far too ignorant of North African ethnography to be able to say whether any such people were there, or if so, who their representatives may now be, and till our ignorance is dispelled, it is idle to speculate on mere probabilities.
We know something of the migrations of the peoples settled around the shores of the Mediterranean for at least ten centuries before the birth of Christ, but neither in Greek or Roman or Cathaginian history, nor in any of the traditions of their literature, do we find a hint of any migration of a rude people, either across Egypt or by sea from Asia, and, what is perhaps more to the point, we have no trace of it in any of the intermediate islands. The Nurhags of Sardinia, the Talayots of the Balearic Islands, are monuments of quite a different class from anything found in France or Algeria. So too are the tombs of Malta, and, as just mentioned, there are no such remains in Sicily.
We seem thus forced back on the third hypothesis, which contemplates the rise of a dolmen style of architecture at some not very remote period of the world's history, and its general diffusion among all those kindred races of mankind with whom respect for the spirits of deceased ancestors was a leading characteristic.
Tripoli.
Dr. Barth seems to be the only traveller who has in recent times explored the regions about Tripoli to a sufficient extent and with the requisite knowledge to enable him to observe whether or not there were any rude-stone monuments in that district. About
