14 N. F. Robarts on the Plateau Gravel, Upper 
Flint lying undisturbed in the remains of their original matrix, 
though this is only negative evidence. 
As building operations may take place during the next few 
years at other points near the escarpment, it would, I think, be 
very desirable to keep a close watch upon any excavations, as 
new facts may be obtained about both the Red Clay with Flints 
and the Southern Drift, more especially about the latter. 
8.—Txr Prareau Gravet, Upper Norwoopd, AND ASSOCIATED 
Komiruic ImMpLEMENTs. 
By N. F. Roparrs, F.G.S§. 
(Read May 19th, 1903.) 
A rew weeks since the Croydon Corporation commenced 
making a drain on South Norwood Hill, from about 150 yards 
below Grange Hill to the corner of Beulah Hilland Church Road. 
As the trench approached the stables of ‘ Falkland Park,’ I 
noticed gravel being thrown out, and I thereafter watched the 
progress of the work almost to its final point. It is seldom 
that the gravel upon the top of Norwood Hill is exposed, the 
whole neighbourhood having been built upon, though, in view of 
the number of houses to let, there is, I should think, a strong 
probability that before long some of the larger ones will be 
pulled down, and roads cut through the grounds, which may be 
of advantage to geologists, if not to the other residents. 
Two or three years since a shallow trench was dug along 
Church Road for the purpose of laying electric mains, but this 
was only about two feet in depth, and scarcely touched the gravel 
in situ. The drain which has recently been made was carried to 
a uniform depth of five feet, and the lower part was throughout 
almost the entire length in undisturbed clay or gravel. 
Our member, Mr. E. A. Martin, F.G.8., writing in ‘ Science 
Gossip,’ September, 1900, refers to the gravel, under the title 
of Westow Hill Gravels, as follows :—‘* Recent excavations have 
shown that the gravel is here of considerable extent, and in a 
direction north to south along Church Road it cannot be far 
short of a mile in length... . The excavation in which the 
wires were laid was about four feet deep, but in some places 
somewhat deeper. From Grange Hill to All Saints Church 
there was little or no ‘soil,’ the road material resting on a 
