Romanising of Britain onwards, the similarity between the peoples who faced one another across the Channel waned. It is quite probable that in neither country was there any appreciable infusion of Italian-Roman blood among the Celtic populations, for the conquering legions were composed of troops raised from all parts of the Empire, but in Britain the Romanised population was swept westwards by new invaders from northern Europe, while the Romanised Gauls were never ousted from the territory they had held east of the Rhone and the Rhine. The Latin tongue had probably made very little headway in Britain, while in Gaul the Romans had thrust their language upon the Gallic tribes. It was not, however, the classical Latin of Livy and Virgil, but most probably the colloquial Latin of the common soldier and camp-follower. This debased Latin formed the solid foundation of the literary language of France of to-day. [Illustration: COMBOURG. A TYPICAL CHATEAU OF THE MEDIAEVAL TYPE.] The English Channel is therefore a very effective dividing line between two peoples completely different in every characteristic. But who were these people whom the Romans called Galli? Their coming was possibly not earlier than 600 or 700 B.C., and by 300 B.C. they occupied that part of Europe now covered by France, Belgium, Holland, Rhenish Germany to the Rhine, with Switzerland and northern Italy. No doubt they had moved westward from southern Russia in that Aryan stream of which they had formed a part. In the south they intermingled with the ancient Iberian population; they appear to have remained fairly pure in the centre, while in the north they became more or less mixed with Teutonic elements pressing forward across the Rhine. Besides occupying what is now known as France, these Celts settled or squatted all over northern Italy, and drove a very considerable wedge into central Spain, where they formed the fierce warrior people called Celtiberians, who served in masses in the Carthaginian and Greek armies, and held out against the Romans until about 100 B.C. Further than this a wing of these Gaulish Celts made their way along the Danube, wasted Greece in about 270 B.C., and formed an important settlement in Asia Minor which was called Galatia up to about A.D. 500. The Celts in Italy were the first to come under the heel of Rome between 300 and 190 B.C. Gaul itself followed, and a Roman province, named Narbonensis after its chief city Narbo Martius (now Narbonne), was formed along the Mediterranean coast. All the rest of Gaul was added between 58 and 50 B.C. by Gaius Julius Caesar, and from that time until the disruption of the Roman Empire was one of its greatest and richest provinces.