From the common Central Asian home, colonies of warlike Aryans gradually dispersed themselves, still in the pre-historic period, under pressure of population or hostile invasion, over many districts of Europe and Asia. Some of them moved southward, across the passes of Afghanistan, and occupied the fertile plains of the Indus and the Ganges, where they became the ancestors of the Brahmans and other modern high-caste Hindoos. The language which they took with them to their new settlements beyond the Himalayas was the Sanskrit, which still remains to this day the nearest of all dialects that we now possess to the primitive Aryan speech. From it are derived the chief modern tongues of northern India, from the Vindhyas to the Hindu Kush. Other Aryan tribes settled in the mountain districts west of Hindustan; and yet others found themselves a home in the hills of Iran or Persia, where they still preserve an allied dialect of the ancient mother tongue. But the mass of the emigrants from the Central Asian fatherland moved further westward in successive waves, and occupied, one after another, the midland plains and mountainous peninsulas of Europe. First of all, apparently, came the Celts, who spread slowly across the South of Russia and Germany, and who are found at the dawn of authentic history extending over the entire western coasts and islands of the continent, from Spain to Scotland. Mingled in many places with the still earlier non-Aryan aborigines–perhaps Iberians and Euskarians, a short and swarthy race, armed only with weapons of polished stone, and represented at the present day by the Basques of the Pyrenees and the Asturias–the Celts held rule in Spain, Gaul, and Britain, up to the date of the several Roman conquests. A second great wave of Aryan immigration, that of the Hellenic and Italian races, broke over the shores of the _Ægean_ and the Adriatic, where their cognate languages have become familiar to us in the two extreme and typical forms of the classical Greek and Latin. A third wave was that of the Teutonic or German people, who followed and drove out the Celts over a large part of central and western Europe; while a fourth and final swarm was that of the Slavonic tribes, which still inhabit only the extreme eastern portion of the continent. With the Slavonians we shall have nothing to do in this enquiry; and with the Greek and Italian races we need only deal very incidentally. But the Celts, whom the English invaders found in possession of all Britain when they began their settlements in the island, form the subject of another volume in this series, and will necessarily call for some small portion of our attention here also; while it is to the Germanic race that the English stock itself actually belongs, so that we must examine somewhat more closely the course of Germanic immigration through Europe, and the nature of the primitive Teutonic civilisation.