Though it is impossible to ascertain what physical changes different branches of the human family may have undergone anterior to the historic epoch, yet we have the best proofs that since then, no race has changed its peculiar characteristics. The historic epoch comprises about one half of the time during which our earth is supposed to have been inhabited, and there are several nations whom we can trace up to the verge of ante-historic ages; yet we find that the races then known have remained the same to our days, even though they ceased to inhabit the same localities, and consequently were no longer exposed to the influence of the same external conditions. Witness the Arabs. As they are represented on the monuments of Egypt, so we find them at present, not only in the arid deserts of their native land, but in the fertile regions and moist climate of Malabar, Coromandel, and the islands of the Indian Ocean. We find them again, though more mixed, on the northern coasts of Africa, and, although many centuries have elapsed since their invasion, traces of Arab blood are still discernible in some portions of Roussillon, Languedoc, and Spain. Next to the Arabs I would instance the Jews. They have emigrated to countries in every respect the most dissimilar to Palestine, and have not even preserved their ancient habits of life. Yet their type has always remained peculiar and the same in every latitude and under every physical condition. The warlike Rechabites in the deserts of Arabia present to us the same features as our own peaceable Jews. I had occasion not long since to examine a Polish Jew. The cut of his face, and especially his eyes, perfectly betrayed his origin. This inhabitant of a northern zone, whose direct ancestors for several generations had lived among the snows and ice of an inhospitable clime, seemed to have been tanned but the day before, by the ardent rays of a Syrian sun. The same Shemitic face which the Egyptian artist represented some four thousand or more years ago, we recognize daily around us; and its principal and really characteristic features are equally strikingly preserved under the most diverse climatic circumstances. But the resemblance is not confined to the face only, it extends to the conformation of the limbs and the nature of the temperament. German Jews are generally smaller and more slender in stature than the European nations among whom they have lived for centuries; and the age of puberty arrives earlier with them than with their compatriots of another race.[144] This is, I am aware, an assertion diametrically opposed to Mr. Prichard's opinions. This celebrated physiologist, in his zeal to prove the unity of species, attempts to prove that the age of puberty in both sexes is the same everywhere and among all races. His arguments are based upon the precepts of the Old Testament and the Koran, by which the marriageable age of women is fixed at fifteen, and even eighteen, according to Abou-Hanifah.[145]