112 
THE GKOLOGIST. 
consequences and proofs, probably, of the treatment it has endured sine 
its deposition. 
Mr. Evans, of Hemel Hempstead, to whom^I some time since submitt* 
it, has been so kind as to send me the following opinion respecting it : — 
" I have examined it carefully, and the conclusion to which I arrive i 
that it does not belong to the ' Drift period,' but that it must be class© 
Flint Implement from between Norwich and Caistor. 
among the implements of the so-called ' Stone period.' The general forn 
is very much that of the ordinary stone ' celt,' adapted for cutting at tli( 
broad end ; a portion, however, of the edge has been broken or worn away 
I am not sure whether there are not some traces of its having been grounc 
on some parts of its surface. 
" Judging from the appearance, I should say that the ' celt ' had been 
lying upon or near the surface for a considerable time, in rather a sandy 
soil. It seems to be altered superficially to a considerable depth, and the i 
numerous rusty marks upon it testify to its having frequently been brought | 
into contact with the plough and harrow, whose rude assaults its tough 
constitution has enabled it to withstand."* 
* Extract of a letter from John Evans, Esq., F.S.A., F.G.S., June ISth, 1862. | 
i 
