7. The precise locality of the origin of man can be defined on probable grounds as in a temperate region, supplied with the vegetable productions most useful to him in a natural state, and free from destructive animal rivals. We can scarcely suppose that this locality can have been in any of those parts of the world in which man finds the greatest difficulty in subsisting, or becomes most degraded, though this paradoxical view has been held by some archæologists. It must rather have been in some fertile and salubrious region of the northern hemisphere; and probability as well as tradition points to those regions in South-Western Asia which have not only been the earliest historical abodes of man, but are also the centres of the animals and plants most useful to him. It is interesting to note here that Hæckel, on purely physical grounds, decides against Europe, Africa, Australia, and America, and concludes that 'most circumstances indicate Southern Asia.' 8. It is to be observed, however, that the diluvial interlude gives a double origin of man; but the historical accounts of the neocosmic dispersion, as we have already seen, refer us in this case also to the same regions of South-Western Asia. The traditions which ascribe human origin to a 'Mountain of the North' refer to the second dispersion, and coincide with the Ararat of Genesis and the 'Mountain of the North' on which the ship of Hasisadra was supposed by the Chaldeans to have grounded. 9. We are now in a position to correlate the historical Deluge with the great geographical changes which closed the palanthropic age. This, when regarded as an established fact, furnishes the solution of many of the most disputed questions of anthropology. The misuse of the Deluge in the early history of geology, in employing it to account for changes that took place long before the advent of man, certainly should not cause us to neglect its legitimate uses, when these arise in the progress of investigation. It is evident that if this correlation be accepted as probable, it must modify many views now held as to the antiquity of man. In that case, the modern rubble spread over plateaus and in river valleys, far above the reach of the present floods, may be accounted for, not by the ordinary action of the existing streams, but by the abnormal action of currents of water diluvial in their character. Further, since the historical Deluge cannot have been of very long duration, the physical changes separating the deposits containing the remains of palæocosmic men from those of later date would, in like manner, be accounted for, not by slow processes of subsidence, elevation, and erosion, but by causes of a more abrupt and cataclysmic character.