The President of the British Association, in his opening speech at the meeting of 1860, affirms the immense antiquity of these flint implements, and remarks:—­“At Menchecourt, in the suburbs of Abbeville, a nearly entire skeleton of the Siberian rhinoceros is said to have been taken out about forty years ago,—­a fact affording an answer to the question often raised, as to whether the bones of the extinct mammalia could have been washed out of an older alluvium into a newer one, and so redeposited and mingled with the relics of human workmanship.  Far-fetched as was this hypothesis, I am informed that it would not, if granted, have seriously shaken the proof of the high antiquity of human productions; for that proof is independent of organic evidence or fossil remains, and is based on physical data.  As was stated to us last year by Sir Charles Lyell, we should still have to allow time for great denudation of the chalk, and the removal from place to place, and the spreading out over the length and breadth of a large valley, of heaps of chalk-flints in beds from ten to fifteen feet in thickness, covered by loam and sands of equal thickness, these last often tranquilly deposited,—­all of which operations would require the supposition of a great lapse of time.”

An independent proof of the age of these gravel-beds and the associated loam, containing fossil remains, is derived by the same authority from the large deposits of peat in the valley of the Somme, which contain not only monuments of the Roman, but also those of an older, stone period, the Finnic period; yet, says Lord Wrottesley, “distinguished geologists are of opinion that the growth of all the vegetable matter, and even the original scooping out of the hollows containing it, are events long posterior in date to the gravel with flint-implements,—­nay, posterior even to the formation of the uppermost of the layers of loam with fresh-water shells overlaying the gravel.”

The number of the flint implements is computed at above fourteen hundred in an area of fourteen miles in length and half a mile in breadth.  They are of the rudest nature, as if formed by a people in the most degraded state of barbarism.  Some are mere flakes of flint, apparently used for knives or arrow-heads; some are pointed and with hollowed bases, as if for spear-heads, varying from four to nine inches in length; some are almond-shaped, with a cutting edge, from two to nine inches in length.  Others again are fashioned into coarse representations of animals, such as the whale, saurian, boar, eagle, fish, and even the human profile; others have representations of foliage upon them; others are either drilled with holes or are cut with reference to natural holes, so as to serve as stones for slings, or for amulets, or for ornaments.  The edges in many cases seem formed by a great number of small artificial tips or blows, and do not at all resemble edges made by a great natural fracture.  Very few are found