Finally. The phenomena of deltas, terraces, and ancient sea-beaches, make the period of the drift immensely more remote than the deluge of Noah, since these phenomena are all posterior to the drift period. I need not go into the details of this argument here, since I have drawn them out in my second lecture. But of all the arguments ever adduced to prove the great length of time occupied in geological changes, this--which, so far as the terraces are concerned, has never before, I believe, been adduced--seems to me the most convincing to those who carefully examine the subject. We may be sure, then, that the commencement of the drift period, and the deluge of Noah, cannot have been synchronous. But the drift agency, connected, as nearly all geologists seem now to be ready to admit, with the vertical movements of continents, may have operated, and undoubtedly has, at various periods, and very possibly, in some parts of the world, long posterior to the period usually called the drift period. I agree, therefore, in opinion with one of the most eminent and judicious of the European geologists, Professor Sedgwick of Cambridge, when he says, "If we have the clearest proofs of great oscillations of sea level, and have a right to make use of them, while we seek to explain some of the latest phenomena of geology, may we not reasonably suppose, that, within the period of human history, similar oscillations have taken place in those parts of Asia which were the cradle of our race, and may have produced that destruction among the early families of men, which is described in our sacred books, and of which so many traditions have been brought down to us through all the streams of authentic history?"--_Geology of the Lake District_, p. 14. _Secondly. Admitting the deluge to have been universal over the globe, it could not have deposited the fossil remains in the rocks._ This position is too plain to the practical geologist to need a formal argument to sustain it. But there are many intelligent men, who do not see clearly why the remains of marine animals and plants may not be referred to the deluge. And if they could be, then all the demands of the geologist for long periods anterior to man are without foundation. But they cannot be, for the following reasons:-- First. On this supposition the organic remains ought to be confusedly mingled together, since they must have been brought over the land promiscuously by the waters of the deluge; but they are in fact arranged in as much order as the specimens of a well-regulated cabinet. The different rocks that lie above one another do, indeed, contain some species that are common; but the most are peculiar. It is impossible to explain such a fact if they were deposited by the deluge.