Without at all wishing, at present at least, to insist upon it, I may here state that the impression on my mind is every day growing stronger that the dolmen-builders in France are the lineal descendants of the Cave men whose remains have recently been detected in such quantities on the banks of the Dordogne and other rivers in the south of France.[387] These remains are found in quantities in the Ardèche[388] and in Poitou.[389] If they have not been found in Brittany, it may be that they have not been looked for, or that the soil is unfavourable to their preservation; but they have been found in Picardy, though possibly not exactly of the same class. It is, of course, dangerous to found any argument on such local coincidence, as new discoveries may be made in the east of France or elsewhere; but in the present state of our knowledge the Cave men and the dolmens seem not only conterminous but their frequency seems generally to be coincident. As we know next to nothing of the languages spoken in the south-west of France before the introduction of the Romance forms of speech, philology will hardly assist us in our enquiry. There is, however, one particle, _ac_, which I cannot help thinking may prove of importance, when its origin is ascertained. In the table at the end of this chapter, I have placed the number of the names of the cities having this termination in each department[390] next to M. Bertrand's number of dolmens. The coincidence is certainly remarkable, more especially as it is easy to account for the comparative paucity of names with this termination in Brittany by taking into account the enormous reflex wave of Celtic population from England that overwhelmed that country in the fourth and fifth centuries, and changed the nomenclature of half the places in the district: still, Carnac and Tumiac, Missilac, and others, as names of monuments, and Yffignac, as the name attached to the port which I believe was the place of embarkation for England, with many others that remain, are sufficient to attest that more previously may have existed.