In another circumstance, also, which has been mostly too little attended to, this disparity between the Mosaic description and the present conformation of those regions is particularly striking. The geography of the rivers of Paradise, at least of two or three, may be easily traced, though the fourth remains a matter of uncertainty; but the one source of Paradise in which those four rivers had their rise, in order thence to spread, and diffuse fertility over the whole earth--this one source, which is precisely the object of most importance, can no where be found on the earth; whether it be dried or filled up, or howsoever it has been removed. In attending to some indications in Scripture, and without transgressing the due limits of interpretation, may we not be permitted to conjecture that the first chastisement inflicted on man by expulsion from his first glorious habitation and primeval home, may have been accompanied by a change in Paradise brought about by some natural convulsion? To judge by analogy, and from circumstances, which even a passage in Holy Writ alludes to, this convulsion must have been rather a volcanic eruption, by which even at the present day the sources of rivers are dried up, and their course completely changed, than a mere inundation that we are ever wont to regard as the sole possible cause of physical revolutions. Many vestiges of such changes may perhaps be proved from even geological observation;--thus to cite only one example, the dead sea in Palestine itself may be included in the number of those lakes that bear very evident traces of a volcanic origin. The supposition, however, which we have ventured to make, must not be looked upon in the light of a formal hypothesis, but rather as a question dictated by a love of enquiry, and by a desire for the further elucidation of a subject not yet sufficiently understood.
Thus have I now taken a general survey of the early condition of the globe, considered as the habitation of man, and as far as was necessary for that object; and in this rapid sketch, I have endeavoured, as far as was possible for a layman, to place in the clearest light the most remarkable and best attested facts and discoveries of geology, with a constant attention to the testimony of primitive and historical tradition. No longer embarrassed by these physical discussions, we may now proceed to meet the main question: "What relation hath man to this his habitation--earth; what place doth he occupy therein; and what rank doth he hold among the other creatures and co-habitants of this globe, what is his proper destiny upon, and in relation to, the earth, and what is it which really constitutes him Man?"