So with the racial type. Fundamentally, one physical type stretches from Cape Horn to Alaska. Superficially, it is intricately variegated—here with round heads, there with long—with short faces or hooked noses or tall statures or wavy hair, in this or that group of tribes. In fact, it might seem that during ten thousand years the variety of climates and habitats might have succeeded in moulding the Indian into racial types of even greater distinctness than we encounter; until we remember that he found the two continents empty, and was never subjected to mixtures with white or black or dwarf races, to mixtures such as were experienced by many of the peoples of the eastern hemisphere.