In a previous paper which I had the honour to submit to the Society on Silchester and its affinities to the pre-Roman civilization of Gaul, I described the definite resemblances in form of town-plan and other features of the settlement type to be found at Silchester (Calleva Atrebatum) and other similar early sites in this country, to known settlements of the Gauls in France and Northern Italy. From this I concluded that a considerable immigration of Gauls took place from France to this country somewhat prior to the first century of our era and subsequent to the expeditions of Julius Caesar; that a permanent settlement of these Gauls in South Britain resulted, and that they retained their national customs and institutions throughout the Roman and well into the Saxon period of our history. I further suggested that the general direction of this immigration was from the mouth of the Seine to the Sussex coast and inland towards the Berkshire Downs and the head-waters of the Thames. In the present paper an attempt is made to indicate with some measure of precision the main route followed by the immigrants towards the interior, and the area of their settlement.