5 
it follows that the implement itself affords evidence that it 
was coeval with the beds in which it is found. 
4th. That the beds in which these implements are found contain 
the remains of mammalia, the majority of which are of 
extinct species. That these mammalian remains have not 
been washed out of any older geological formation, but that 
the animals to which they belonged lived and died during the 
deposition of these drift beds. True, where the deposit is a 
coarse gravel, the bones, like the implements and the gravel 
itself, are water-worn; all, as constituent parts of the same 
bed, have been subjected to the same rolling action; but, in 
the tranquil reaches of the ancient drift river, where it 
assumed a lacustrine character, and the deposit, as at Fisherton 
Anger, is brick-earth, the sediment of turbid but at least 
tranquil water, the mammalian remains have not been rolled 
at all; the carcase may have floated down the stream, or the 
animal may have died on the spot, but the bones, divested of 
the integuments, have not travelled at all, and, in looking at 
them, we see the remains of the veritable fauna of the drift 
period. 
To sum up what has been advanced. The human worked flints 
are shown to be coeval with the drift. The unrolled condition of 
the extinct mammalian bones (proving that they could not have 
been derived from older formations), establishes the fact that these 
animals also were coeval with the drift, and therefore that man, the 
fabricator of the implement, was coeval with the Mammoth and the 
other extinct animals whose remains occur in the drift. 
Flint implements, found in drift deposits, have been divided 
into three groups— 
1. Flakes, of which No. 12 is an example, and plate 1, fig. 1 
and 2. 
2. Weapons, with an acute or else a rounded point, as Nos. 9 
and 37, spear-shaped type (see plate 2, fig. 1 and 2). 
3. Oval or almond shaped implements, with a cutting edge all 
round, as Nos. 28 and 32 (see plate 1, fig. 3). 
There is, however, so much variety in form, that these classes 
blend or run the one into the other. This applies in an especial 
degree to the second and third classes. 
1. Portion of upper molar of horse (Equus caballus). 
2 and 3. Flint implements. 
Nos. 1 to 3 are from the Pleistocene gravel of Amiens, and 
are deposited by Mr. C. J. Read. 
4. Upper molar of horse (Equus caballus). 
5 to 13. Flint implements. 
Nos. 4 to 13 are from the Pleistocene gravel at Porte Marcade, 
Abbeville, and are deposited by Dr. H. P. Blackmore. 
