12 
and on gently removing it from its bed, I picked out of the . shattered 
pieces two well-formed cores, each having five facets four inches in length. 
These cores speak for themselves, and confirm the evidence before produced 
of the natural formation of the flakes. 
Discs , — These circular flints are the “ sling-stones ” of Sir William Wilde 
and Nilsson, and the “ discoidal implements ” of Mr. Stevens, who describes 
them as being nearly circular and coarsely worked, and brought to an edge 
ah round, and considers that they may have been used as missiles. Of these 
so-called implements the manner of their formation may be readily discovered 
by common-sense observation of the mode of fracture of the flints on the 
surface of the ground on the chalk-hills. On a considerable number of sur- 
face flints, cup-like cavities are formed on their face perfectly circular in 
shape, not larger than a sixpence, and often so numerous and close together 
as to cover the whole of the surface of the flint. In many of these cups the 
white patina and the discoloration by time is much greater than in others; in 
some instances it is altogether wanting, and in others the fracture is as fresh 
as if just broken. Here we have an evidence of age, and an indication that 
the cups were formed at various and distinct periods of time. The smal 
discs corresponding with the cavities may often be picked up in considerable 
numbers, and I have found many of them in the ochreous flint gravel which 
coats the footpaths around Redhill railway-station. The discs also vary m size 
from that of the smallest button to the largest watch, and some few I have 
found in the valley of the Little Ouse from four to six inches in diameter, 
some with the fracture as fresh as if broken yesterday ; and the circular 
cavities or casts from which the discs were dislodged are there also found on 
