Craniology was anthropology itself, whilst this science was being cultivated merely by learned men in their studies. If a skull does not always bear about it the stamp of the race to which it belongs, we must nevertheless own that it is the best representative of the dead individual. Craniology obtains all its weight and powers from the study of ancient races and extinct peoples. There it ought to intervene with an unequalled importance, for want of better points of reference. By its means anthropology can search in the past, clearing up those questions which history is incapable of explaining. In this manner Morton has been able to prove better than by any historical document that Ancient Egypt was inhabited by very mixed races, and composed of the most different elements, exactly as in our own days. But there remained a problem even more interesting: that of knowing if the different races who then inhabited the banks of the Nile were as much divided into various occupations as at the present day: the Albanians are all soldiers, the Copts all scribes and officials, the Fellahs all labourers, etc. Doubtless it would be possible, if not easy, to arrive at the solution of this new problem by collecting skulls and mummies with more care than has hitherto been done, and, above all, by assisting the researches of the Egyptiologists, who can read upon the coffin that such and such a body is that of a workman, a priest, or a king. We may thus be able to ascertain if the kings of such or such a dynasty were black or yellow; if the dominant population of such or such a _nome_ had the Coptic, Berberine, or Fellah type. Here we have a large field for study, which has been almost entirely neglected by the American school of anthropology, precisely because Morton found himself without information about the production and true age of the immense materials which he had at his disposal. But we must not be forgetful: the classification of skulls by their shape, of hairs by their colour, or skins by their hue, is not the classification of races of mankind. We only perceive here one order of phenomena. A classification established upon such bases has its point of departure only in the mind of him who conceived it, and not in the nature of things.