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eminent Danish antiquary, Mr. Worsaae, has been led by his 
own observations to a similar conclusion. He has found in 
mounds on the fiords in Denmark, or at the bottom of bogs, 
covered with large hills of gravel, clay, and sand, implements 
of flint, neither ground nor polished, different in form from 
those which occur in Denmark in sepulchral tumuli, but 
resembling those discovered in bone caves and in the gravel 
beds of Abbeville and Amiens.* And he comes to the 
conclusion that these latter belong to an earlier age than 
those of the tumuli and cromlechs, and to a ruder race. 
I presume that Mr. TTorsaae, who can hardly have seen the 
flint implements of Kent's Cavern, when he speaks of bone 
caves has had some other discoveries in view. Mr. 
M'Enery's account leads us to believe in the existence of 
a difference, but does not enable us to decide on its amount. 
The prehistoric age of Europe has been divided into the 
Stone Period and the Bronze Period ; but that a subdivision 
of the stone period itself is required is a conclusion which 
has latterly forced itself upon historical inquirers ; and, in 
the absence of written records, it is only to material 
antiquities that we must look for the means of deciding the 
question. The rate of the deposition of the stalagmite 
appears, in Kent's Cave, to have been subject to irregularities 
which preclude the possibility of founding upon it any 
calculation of chronology. At present the deposit has 
ceased. 
There is something truly formidable in the list which Mr. 
M'Enery gives of the ferocious animals, whose teeth remain 
to attest their powers of destruction. The elephant and the 
rhinoceros appear as peaceful creatures among the gigantic 
* See also Mr. Lubbock's paper on tbe Kjokken Modelings of Denmark, 
" Natural History Review," Oct., 1861. Tbe bones found in tbese heaps, 
however, are not those of the extinct animals which occur in the drift 
gravel and bone caves. They belong to a geological epoch not very different 
from our own. 
