But do a few hundred skulls justify these far-reaching conclusions regarding races enduring for thousands of years? At some very remote period there may have been a Celtic type, as at some further period there may have been an Aryan type. But the Celts, as we know them, must have mingled with the aborigines of Europe and become a mixed race, though preserving and endowing others with their racial and mental characteristics. Some Gauls or Belgæ were dolichocephalic, to judge by their skulls, others were brachycephalic, while their fairness was a relative term. Classical observers probably generalised from the higher classes, of a purer type; they tell us nothing of the people. But the higher classes may have had varying skulls, as well as stature and colour of hair,[24] and Irish texts tell of a tall, fair, blue-eyed stock, and a short, dark, dark-eyed stock, in Ireland. Even in those distant ages we must consider the people on whom the Celts impressed their characteristics, as well as the Celts themselves. What happened on the Eurasian steppe, the hypothetical cradle of the "Aryans," whence the Celts came "stepping westwards," seems clear to some, but in truth is a book sealed with seven seals. The men whose Aryan speech was to dominate far and wide may already have possessed different types of skull, and that age was far from "the very beginning."
Thus the Celts before setting out on their _Wanderjahre_ may already have been a mixed race, even if their leaders were of purer stock. But they had the bond of common speech, institutions, and religion, and they formed a common Celtic type in Central and Western Europe. Intermarriage with the already mixed Neolithic folk of Central Europe produced further removal from the unmixed Celtic racial type; but though both reacted on each other as far as language, custom, and belief were concerned, on the whole the Celtic elements predominated in these respects. The Celtic migration into Gaul produced further racial mingling with descendants of the old palæolithic stock, dolichocephalic Iberians and Ligurians, and brachycephalic swarthy folk (Broca's Celts). Thus even the first Celtic arrivals in Britain, the Goidels, were a people of mixed race, though probably relatively purer than the late coming Brythons, the latest of whom had probably mingled with the Teutons. Hence among Celtic-speaking folk or their descendants--short, dark, broad-beaded Bretons, tall, fair or rufous Highlanders, tall chestnut-haired Welshmen or Irishmen, Highlanders of Norse descent, short, dark, narrow-headed Highlanders, Irishmen, and Welshmen--there is a common Celtic _facies_, the result of old Celtic characteristics powerful enough so to impress themselves on such varied peoples in spite of what they gave to the Celtic incomers. These peoples became Celtic, and Celtic in speech and character they have remained, even where ancestral physical types are reasserting themselves. The folk of a Celtic type, whether pre-Celtic, Celtic, or Norse, have all spoken a Celtic language and exhibit the same old Celtic characteristics--vanity, loquacity, excitability, fickleness, imagination, love of the romantic, fidelity, attachment to family ties, sentimental love of their country, religiosity passing over easily to superstition, and a comparatively high degree of sexual morality. Some of these traits were already noted by classical observers.