NEW RAILWAY-CUTTING AT GUILDFORD. 613 
and even beyond our area on the French coast, is one that would 
make this communication far too long ; I have neither the experience 
nor the knowledge to treat of such a subject in the manner it deserves. 
There are, however, many geologists capable of taking it up, and 
whose subject it is, and to them I must leave it. 
In conclusion, I take this opportunity of acknowledging the very 
great assistance I have received from James H. Mangles, Esq., re- 
presenting the Board of Directors, and the South-Western Railway 
Staff. Particularly I am indebted to the Contractors’ Engineer of 
the new line, — Wills, Esq., who placed all the working-plans in his 
office at my disposal. I recall with pleasure the attention I received 
from all the overseers, gaugemen, and labourers with whom I came 
in contact during many hours spent upon the Sections they were 
opening up. 
Discussion. 
Prof, Prestwicn said that a similar railway-section north-west of 
Guildford exhibited no Drift, hence the peculiar interest of this 
section. He referred to Mr. Godwin-Austen’s paper on Pease Marsh, 
and remarked that results therein arrived at were strikingly con- 
firmed by those obtained by the study of the new cutting. The 
height above the river showed that the high-level gravels resemble 
those of the Bagshot district, which have no relation to any present 
drainage, although gravels at lower levels are so related. He was 
not aware that any gravels at this level had before been recorded 
at Guildford. 
Mr..Tortey said that the correlation of the higher gravels with 
those of Tillingbourne was satisfactory, as this rendered the intro- 
duction of Post-tertiary faults unnecessary. 
Colonel Gopwry-Avsten, in reply, said that there was no proof 
of faults in the Tillingbourne valley having disturbed Post-tertiary 
gravels. The lower-level gravels of Pease Marsh could be traced 
throughout at the same general level. Those higher up the valley 
about Gomshall might possibly correspond to the higher-level gravels 
and sands at Guildford. 
Q.J.G.8. No. 160. 27 
