I may here observe, that as far as we can perceive, the various independent communities of Britain and Gaul mentioned by Cæsar, such as the Edui, the Venetes, &c., did not consist of _one_ clan or sept, they seem rather to have been a combination of several contiguous septs, to whom no appropriate common name _could have been_ given, except one derived from the natural features of the district they occupied. The durability of local names has been already noticed. Of this truth we possess remarkable proofs in those of localities in France, as preserved by the modern French to the present day. I do not doubt that the present French names are, in many instances, much more faithful transcripts of the original Celtic appellations than those which occur in the Roman Maps are. Thus, for example, Bonomia, a name conferred by the Romans upon Boulogne, and of which the origin has perplexed Antiquarics, may easily be explained as a Roman abbreviation of the word Boulogne itself, of which the Celtic meaning will be shown hereafter to be appropriate and unequivocal. Here it may be noticed, that the Celtic language did not become extinct in Gaul until many centuries after the termination of the Roman sway and the establishment of the Franks in that country. The use of the old Gaulish or Celtic continued until the eighth century, nearly until the time of Charlemagne.(56) Now we know that the modern Welsh and Irish, for the most part, continue to use their own primitive names of localities in those cases in which abbreviations or translations have been substituted by the English. There can be no reasonable doubt that the ancient Gauls did the same, and that these names were in use among the inhabitants of each locality at the time of the final subjugation of Gaul by the Franks, by whom, in many instances, these names are more likely to have been adopted than those used by the Romans. It will also be observed in the course of the following examples, that names of the class about to be noticed, viz., Topographical names of which the elements are not extant in the existing Celtic dialects, but occur in Oriental words, &c., are remarkably well preserved by the modern French. Thus the “Aube,” as pronounced by the French, is identical in sound with the Asiatic terms for Water, and names of Rivers, to which it is allied.