20 
Mr. William Phillips on the 
bay : soon afterwards another rises which is about half an inch thick, 
and is visible for nearly a mile about 20 feet below the former. 
Quitting St. Margaret’s Bay for Dover, the chalk with numerous 
flints appears to rise gradually ; forming, at the latter place, when 
viewed from the shore, apparently about one-third the whole height 
of that part of the cliff upon which the castle stands. Soon after 
leaving St. Margaret’s Bay, the beds of flint begin to increase in 
distance and in thickness ; in the latter respect they go on increasing 
to that part of the cliff which is immediately beneath the castle;, 
where the thick beds, protruding at least two feet beyond the chalk, 
give rise to the idea of their consisting each of one mass of flint, 
but which their rugged edges, as viewed from below, seem to render 
at least doubtful. Some of these beds exceed a foot in thickness. 
The chalk with numerous flints is again visible on the height west 
of the Castle, at a still greater elevation. That it forms the upper 
part of this height, was proved in making the extensive fortifications 
on its summit, as well as the openings a little beneath, it, immediately 
below the citadel, which were intended for the reception of some 
part of the troops stationed at Dover during the war.. These 
openings are in an unfinished and ruinous state, but they served to 
convince me of an interesting fact. Each of these four chambers is 
driven into the hill about 100 feet, and is perhaps 20 wide and 1,5 
feet high ; and in each, the only roof left to support the superin- 
cumbent chalk is a bed of flint ► I do not say of flints, being con- 
vinced that the whole, is one nearly-continuous, though not regularly 
tabular and evenly-disposed mass. The belief of the existence of 
this fact, in regard to at least many of the beds of flint in the upper 
chalk near Dover, was previously entertained, by observing the 
workmen on the shore cleave several blocks of chalk, each 8 or 10 
feet square, close to the beds of flint passing through them; and in 
