42 Mr. George Clinch on Recent 
was found possible to preserve them for a sufficiently long time 
to allow of a careful examination, not only of their interesting 
and ingenious construction, or rather excavation, but also of the 
loose sand lying upon the floors, and in one case of the material 
with which the entrance and lateral avenue of approach were 
filled. It was thus possible to give much closer attention to 
several points than would have been the case if the chambers 
had collapsed, or if they had been discovered and explored by 
their ancient entrances. 
Some of the observations made, particularly in connection 
with the relative positions of the hard unmoved sand and “‘ made 
earth,’ have proved of great value in the intricate work of tracing 
the ancient environments of these sepulchral chambers. 
Upon removing the loose sand which covered the floors of the 
chambers with an uneyen layer, several cores and chips of green- 
coated flints were found, together with some small fragments of 
imperfectly baked pottery and some larger pieces of Romano- 
British pottery. 
Perhaps I may be pardoned if I take this opportunity of saying 
a word or two about the kind of stones generally known as green- 
coated flints. From the specimens now exhibited it will be seen 
that the external part is of a deep olive-green colour; below this 
is an orange-coloured layer, whilst the interior of the flint 
nodule is of the ordinary unaltered kind seen in a newly-broken 
flint from the Chalk, with which we are all familiar. 
A layer of these green-coated flints is generally, perhaps 
always, found at the base of the Thanet beds. Nearer Waddon 
railway station, where a lower level sewer-trench has been dug, 
there is a well-pronounced stratum containing these green-coated 
flints, and there is clear evidence that these flints have been 
worked into neolithic implements. This digging for special flint 
for implement-making is perhaps one of the more interesting 
points of the discoveries at Waddon. 
Now, the presence within the chambers of flint implements 
made of the green-coated variety is of considerable importance, 
because such flint, which is tough and specially suitable for the 
manufacture of implements, is hardly ever found above the base 
of the Thanet beds. It is pretty clear, therefore, that these 
materials were procured at the lower level and brought up the 
hill to the chambers. This is a piece of work which obviously 
could not have been done by rain-wash or similar forces. 
The worked flints found actually within the chambers consist 
of a large proportion of cores of green-coated flint, a few flakes 
and chips broken from them, and a smaller proportion of cores 
of ordinary chalk-flint. It is probable that some of the more 
minute pieces of flint were overlooked, as, among the sand 
thrown out, a considerable number of small flakes, including a 
