[Footnote 152: The Abyssinians, who still preserve the
features and olive complexion of the Arabs, afford a proof
that two thousand years are not sufficient to change the
color of the human race. The Nubians, an African race, are
pure negroes, as black as those of Senegal or Congo, with
flat noses, thick lips, and woolly hair, (Buffon, Hist.
Naturelle, tom. v. p. 117, 143, 144, 166, 219, edit. in
12mo., Paris, 1769.) The ancients beheld, without much
attention, the extraordinary phenomenon which has exercised
the philosophers and theologians of modern times]