A CHAPTER OF CONCLUSIONS 511 
we marvel that anyone should have denied their human 
origin. Then came the discovery of Eolithic implements 
in deposits of Pliocene date — at St Prest, on the 
Kentish plateau, on the uplands of Belgium, under the 
Crag deposits of East Anglia. The human origin of 
eoliths is still being called in question, but the more these 
shaped flints of Pliocene date are investigated and dis- 
cussed, the greater becomes the number of those who 
regard them as the work of the hands and brain of 
Pliocene man. It is also maintained that flints, similar in 
shape and chipping, have been discovered in deposits of 
Miocene and even of Oligocene age. If it be proved that 
such are of human origin, then we must extend still 
further the period covered by the antiquity of man. 
There is not a single fact known to me which makes the 
existence of a human form in the Miocene period an 
impossibility. 
