Con'e.spo)i(Ieitce — A. IV. Bogcrs, Her. 0. Fisher, Dr. Bather. 47 



the fold has been raised in your pages ? There seemed to me to 

 be no room for doubt as to the anticlinal structure of Tygerber"- ; 

 as Professor Schwarz points out/ such a structure is clearly seen, 

 even in the section of which a photograph is given by Dr. Sandberg 

 in support of his views. There are many sections through the ranee 

 Avhere clear evidence of the existence of the anticline is seen, and one 

 can walk along the axis of the anticline with the beds dipping awaj^ 

 on either side. 



I could find no trace of the Witteberg Beds in situ in the Sand 

 River Valley as required on Dr. Sandberg's view, and as inserted 

 in his sections. On the other hand, the few outcrops there are oi 

 Ecca Beds, and the character of the valley is such as to make it 

 extremely unlikely that the Witteberg Beds ever existed there above 

 the present surface. 



The masses of quartzite in the Dwyka area belong to the Dwyka 

 Series itself ; they are lenticular beds of quartzite such as have been 

 described from that formation in other places on the south and west 

 sides of the Karroo. Akthcr W. Kogeks. 



Geological Commissiox, 



South Afkican Museum, Cave Town. 

 Korewher 17, 1908. 



BUKNING CLIFFS. 

 Siu, — I recollect the burning cliff at Holworth. As a little boy 

 I used to ride my pony often from Osmington to visit it. The fire 

 was in the face ot' a part of the cliff that had slipped so as to form 

 a pond at the back of it. It seems that a disturbance which admits 

 some air and water to favour decomposition is the promoting cause 

 of these occurrences. I have picked up pebbles of baked shale 

 and cellular slag on the beach some twenty years after all traces 

 of the fire had disappeared from the face of the cliff at Holworth. 



0. FiSHKK. 

 Gkaveley, Huxtixgdox. 



• December :'.. 1908. 



FLINTS IN DENMARK. 



Sir, — It is incredible that any Danish geologist can have intended 

 to inform Mr. Sheppard that there was no flint in Denmark (see 

 Geol. Mag., December, 1908, p. 575), Visitors to Copenhagen may 

 have observed the English Church of St. Alban at the entrance to 

 the well-known promenade, Lang Linie. The late Sir Arthur 

 Blomfield told me that, when he was commissioned to build this 

 church, he had some difiiculty in finding a suitable stone, till it 

 occurred to him to enquire, "Have you no flints in your Danish 

 Chalk?" "Plenty," was the reply. Whereupon he adopted this 

 local stone, almost unused before in that country, and raised a buildino- 

 that recalls to English visitors many a familiar church of Sussex, 

 Hampshire, and Norfolk, F. A. Bather. 



Itecembir 2, 1908. 



1 See Geol. Mag., 1907, " The Tyg-erberg Anticline," by Professor E If L 

 Schwarz, pp. 487-90, PI. XXII ; and" 1908, p. 479, 



