At the meeting of the Ethnological Society just held, there seems to have been an increasing tendency to admit the hypothesis of the continuance of the Mammalia of the Tertiary into the human era. Mr Evans, who exhibited specimens taken at a depth of twenty to thirty feet, from a stratum of coarse fresh-water gravel, lying on chalk, and containing an entire skeleton of an extinct Rhinoceros, and overlaid by sandy marl containing existing shells, shewed that the deposit had certainly not been disturbed till the present time, so that the gravel, the bones, and the flints had been deposited coetaneously. He suggested "that the animals supposed to have become extinct before man was created might have continued to exist to more recent periods than had been admitted." And this opinion found support from other leading geologists. That this conclusion would throw the existence of man to an era far higher than that assigned to him by the inspired Word, is, I know, generally held; and certain investigations, made in the alluvial deposit of the Nile,[22] are considered to prove that man has been living in a state of comparative civilisation in the Nile Valley for the last 13,500 years. But that conclusion absolutely rests on the supposition that the rate of increase formed by the annual deposit of the Nile mud has been always exactly the same as now,--a supposition, not only without the least shadow of proof, but also directly contrary to the highest probability, nay, certainty, in the estimation of those who believe in the Noachian deluge. For surely the drainage of the entire plain of North Africa after that inundation must have produced an alluvium of vast thickness in a very brief time; while beneath that deposit the works of the antediluvian world might well be buried. Yet the possibility of there ever having been any greater rate of deposit than within the last 3000 years, the recorder of those investigations, in his unseemly haste to prove the Bible false, strangely leaves wholly out of his consideration. So, doubtless, concerning other deposits containing fossil remains, whose extreme antiquity is assumed from the known rate of surface-increase now, we ought to remember that we have not a tittle of proof that the rate of increase has not at certain remote periods been suddenly and immensely augmented. There are many facts on record which tend to shew that the rate at which geologic changes take place in certain localities affords no reliable data whatever to infer that at which phenomena apparently quite parallel have occurred in other localities. An upheaval or a subsidence of one part of a country may rapidly effect a great change in the amount of soil or gravel precipitated by streams, without destroying or changing their channels, and yet the deposit may be made sufficiently gradually to allow the burial of shells or of bones of creatures which lived and died on the spot.