By Pror. Epwarp Hutt, M.A., F.RS. Ly 
out after the Drift Period. The presence or absence of Drift deposits 
is due to a variety of causes, all of which must be determined 
before we can draw any conclusions therefrom. In the case of the 
ridge traversed by “The Scalp,” the Drift deposits are absent 
generally from all the ground above a level of about 400 to 500 
feet, having either not been deposited above this level, or if 
otherwise, having subsequently been denuded away. The bottom of 
“The Scalp” dell is 500 feet above the sea, and just beyond the 
usual limit of the Drift deposits thereabouts, as shown on the maps 
of the Geological Survey. As a matter of fact, however, I am 
assured by the Rev. M. Close, F.G.S., who has so carefully examined 
the Drift deposits of this district, that he has noticed some traces 
of these beds on the floor of “The Scalp” dell itself; so that its 
greater antiquity than the Drift, or Glacial Period, is thereby 
proved. 
VOL. 1.—PART f. i C 
