480 Correspondence — B. M. Brydone. 



stratiila of false bedding. Then, by varying the depth of water and 

 the rate of current, one can secure almost any deposition, such as 

 coarse over fine, and any contemporary erosion. But at Roundham 

 Head the difficulty is that the variations in the conditions are so^ 

 numerous and so extreme. Added to this there is the marvel 

 throughout the Ked Sandstones of an apparently inexhaustible 

 supply of ready-made material. Hundreds of feet of deposition 

 follow each other with apparently little denudation and erosion 

 from lack of material. The millstones are rarely left to grind each 

 other's facej' for lack of meal. 



It is clear that the fissures in the limestones were washed out 

 clean before being quietly filled with fine Permian sand. But. 

 per contra, the conglomerates seem to have planed at least one 

 Devonian surface smooth, and then to have deposited themselves, 

 horizontally bedded, upon it. That of itself is not a very intelligible 

 operation. 



With reference to the visit of the Geologists' Association to 

 Devonshire in 1900, I have always felt that I owed an apology 

 to the Association for accepting the office of a director both at 

 Torquay and for the Dartmoor walk. I had never attended 

 fi meeting and did not understand the duties of the directoi's, and 

 regarded myself solely as a local guide, it had never occurred to 

 me that I should be expected to say anything on the geological 

 problems encountered, but only to show the way on the moorland 

 walk by devious paths, and to do the honours of Kent's Cavern at 

 'J'orquay. ]\Iy remarks on the conglomerates were only an expression 

 of my own ignorance, and of satisfaction that Dr. Teall had 

 a torrential hypothesis to suggest. The physics of the Devonshire 

 Ked Sandstones are at present most inscrutable. 



A. R. Hunt. 



TRIMMIXGHAM CHALK. 

 Sir. — The coming Winter is possibly the last in which the 

 'North Bluft"' will continue to exist, and in view of Professor 

 Bonney's rejection of m}' observations as to the * grej' chalk ' 

 I hope that some geologist or geologists of recognised position will 

 visit the locality this Autumn to test my accuracy as far as it is still 

 possible. I shall be only too glad to meet anyone on the spot with 

 this object. It is unfortunately no longer possible, owing to the 

 ravages of the sea during the past year, to trace (as I have traced 

 inch by inch and over and over again in the 70 odd visits I have 

 made in the last six years) a continuous sheet of grey chalk from 

 the most westerly point of Professor Bi>nney's block E to the most 

 easterly point of the original bluft", but I think I can still show them 

 enough to make it reasonable to accept as to such continuity the 

 statement of a mere student of fossil polyzoa — if that is a fair 

 description of me. R. M. Brtdone. 



16, SovTH AiDi.EY Street, "W. 

 llih Si-ptember, 1906. 



