46 



Correspondence — /. Reid Moir. 



3. There is a proved thickness of 166 feet of Bagshot Beds above 

 the Pipeclay Series at Worgret Well, some Z^ miles away N.N.W. 

 (See Proc. Dorset Field Chib, vol. xxvii, p. 162.) 



4. A 10 or 20 feet contoured plan on a fairly large scale, indi- 

 cating where trenches and borings have been made and their sections 

 already described, would be a useful aid to any keen geologist who 

 may be interested enough to make further investigation. 



A. H. Bloomfikli) 

 (Twenty-five years Collector to the late Mr. W. H. Hudleston). 



Grange Koad, Waeeham. 

 November 8, 1912. 



FLINT IMPLEMENTS OF EARLY MAN : GEOLOGISTS' ASSOCIATION. 



Sir, — Among the exhibits at the conversazione of the Geologists' 

 Association held on Friday, November 1, at University College, 

 London, was one by Mr. Hazzledine Warren, F.G.S., illustrating 

 pressure-flaking upon flints produced experimentally. 



Mr. Warren had adopted the method of fixing together with some 

 cementing material two stones with the obvious intention of con- 

 veying the impression that in each case the stones so joined were 

 the only two which had been used in producing the flaking upon the 

 uppermost one. When, however, I examined one of the exhibits 

 which showed the uppermost stone with two pressure ' bays ', it 

 was at once clear to me that these two hollows could, under no 



Eolith from Plateau Gravel, Ightham. (Prestv^ich Collection.) 



possible circumstances, have been produced by pressing it upon the 

 underlying stone. On questioning Mr. Warren I elicited the 

 information that he was unable to recollect whether the underlying 

 flint ivas the one upon which the other had been flaked, and, after 

 a long experience of flaking flints by pressure, I have confidence in 

 stating that two such hollows as were shown could not be produced 

 by pressing on any single stone of any sort or kind. As this question 

 of the natural fracture of flint is of the utmost importance in deciding 

 as to the ' humanity' or human origin or otherwise of certain ancient 

 flaked stones, it appears to me most regrettable that Mr. Warren 

 was not more careful in exhibiting reliable specimens. As also some 



