The language originally spoken by this people can only be conjectured by the traces of it left in that of their conquerors, the Celts.(31) But a map of the distribution or their monuments irresistibly suggests the idea that their builders were of North African origin; that they were not at first accustomed to traverse the sea for any great distance; that they migrated westwards along North Africa, crossed into Europe where the Mediterranean at Gibraltar narrows to a strait of a few miles in width, and thence spread over the western regions of Europe, including the British Islands, while on the eastward they penetrated by Arabia into Asia. It must, however, be borne in mind that while originally, no doubt, a distinct race, the Megalithic People came in the end to represent, not a race, but a culture. The human remains found in these sepulchres, with their wide divergence in the shape of the skull, &c., clearly prove this.(32) These and other relics testify to the dolmen-builders in general as representing a superior and well-developed type, acquainted with agriculture, pasturage, and to some extent with seafaring. The monuments themselves, which are often of imposing size and imply much thought and organised effort in their construction, show unquestionably the existence, at this period, of a priesthood charged with the care of funeral rites and capable of controlling large bodies of men. Their dead were, as a rule, not burned, but buried whole—the greater monuments marking, no doubt, the sepulchres of important personages, while the common people were buried in tombs of which no traces now exist. *The Celts of the Plains* De Jubainville, in his account of the early history of the Celts, takes account of two main groups only—the Celts and the Megalithic People. But A. Bertrand, in his very valuable work “La Religion des Gaulois,” distinguishes two elements among the Celts themselves. There are, besides the Megalithic People, the two groups of lowland Celts and mountain Celts. The lowland Celts, according to his view, started from the Danube and entered Gaul probably about 1200 B.C. They were the founders of the lake-dwellings in Switzerland, in the Danube valley, and in Ireland. They knew the use of metals, and worked in gold, in tin, in bronze, and towards the end of their period in iron. Unlike the Megalithic People, they spoke a Celtic tongue,(33) though Bertrand seems to doubt their genuine racial affinity with the true Celts. They were perhaps Celticised rather than actually Celtic. They were not warlike; a quiet folk of herdsmen, tillers, and artificers. They did not bury, but burned their dead. At a great settlement of theirs, Golasecca, in Cisalpine Gaul, 6000 interments were found. In each case the body had been burned; there was not a single burial without previous burning.