263 
implements found in the Danish Kjokkennidddings, but 
these again have a peculiar form, and would be at once 
distinguished by any experienced observer. During my last 
visit to Abbeville, I was much interested by finding, in the 
museum of M. Boucher de Perthes, a few small hatchets, 
which, both in shape and size, very closely resembled those 
which are found in the Danish Kjokkenmoddings, but all of 
these belonged to the later or post-elephantine period. It is, 
I think, probable that similar axes will be found in other 
countries, but that they have generally escaped notice 
hitherto on account of their rudeness. 
Up to the present time no bones of men have been found 
in the strata containing the flint implements. This, though 
it has appeared to some so inexplicable as to throw a doubt 
on the whole question, is, on consideration, less extraordinary 
than it might at first sight appear to be. If, for instance, 
we turn to other remains of human settlements, we shall find 
a repetition of the same phenomenon. Thus in the Danish 
refuse-heaps, where worked flints are a thousand times more 
plentiful than in the St. Acheul gravel, human bones are of 
the greatest rarity. In this case, as in the Drift age, 
mankind lived by hunting and fishing, and could not 
therefore be very numerous. In the era, however, of the 
Swiss lake habitations, the case was different. M. Troyon 
estimates the population of the " Pfahlbauten " during the 
Stone age as about 32,000 ; in the Bronze era, 42,000. On 
these calculations, indeed, even their ingenious author would 
not probably place much reliance : still, the number of the 
Lake villages already known is very considerable ; in four of 
the Swiss lakes only, more than 70 have been discovered, and 
some of them were of great extent : "Wangen, for instance, 
being, according to M. Lohle, supported on more than 
40,000 piles. Yet, if we exclude a few bones of children, 
only five skeletons have been obtained from all these 
T 
