Correspdndence — Sir JET. IT. Ho worth. 525 



original eastern mass, which has met a similar fate, was a stack, the 

 fact (more than once recorded in our notes) that the flint bands in it 

 were fairly horizontal and those in the other sharply curved, was, 

 to say the least of it, singular, for it would require the axis of 

 flexure to have taken a very abnormal course. But if (A) and (0) 

 fomi parts of one stack the position of the tunnel (B) is hardly 

 less singular, for, instead of looking in the teeth of the waves, it 

 takes a sheltered course more nearly parallel with the coastline. 

 It is therefore highly improbable that any other mass than (A) 

 can be a stack, and if so, it is curiously environed by great boulders. 

 But if it be, what becomes of Mr. Eeid's hypothesis? Did the 

 advancing ice-sheet first 'ruck' up the chalk, then retreat to allow 

 the sea to carve out a stack (and make a tunnel if (B) and (C) form 

 one mass), and return to wrap it up in boulder-clay ? Or was 

 a pre-Glacial stack mercifully spared by the ice-sheet ? In fact, the 

 sea-stack hypothesis involves so many difficulties that Mr. Woodward 

 must pardon us for suggesting the possibility of his having been 

 misled in regard to the chalk in the headland being one mass with 

 that in the platform. In a material like chalk, as we found at the 

 arch, it is difficult to determine continuity or discontinuity, and 

 equally so to trace bands of interrupted flints. But be this as it may, 

 Mr. Woodward has discarded Mr. Clement Eeid's hypothesis, and 

 in so doing indirectly justifies our remark that it was out of place- in 

 a Survey memoir. To this we adhere, though it may cause " some 

 surprise " to " students of East Anglian geology " (are they a zonal 

 variety?). This is our reason: A Survey memoir is an official 

 publication, which is inevitably invested with authority. It is also 

 published, as the work is done, at the cost of the nation. We 

 therefore hold that it should be a record of facts, not of hypotheses 

 of a more or less tentative or dubious character : these find a proper 

 home in the ordinary scientific periodicals. Thus no one could 

 object to the appearance of Mr. Eeid's hypothesis in this Magazine, 

 but in the Cromer Memoir a mention of it with a reference would 

 have sufficed. T. G. Bonnet. 



E. Hill. 



THE TRIMINGHAM CHALK. 



Sir, — May I suggest a small innovation in your usual practice, 

 which would be very grateful to your subscribers, namely, the 

 reprinting of Mr. Brydone's remarkable paper in the Geological 

 Magazine. This paper, to which Mr. B. B. Woodward has called 

 timely notice, has virtually only been privately published, and the 

 fact of its not being quoted by Professor Bonney and Mr. Hill may 

 perhaps be thus explained, although it has been out for jive years, 

 and is specially quoted and utilized in so accessible a monograph as 

 the portly Survey Memoir on the Cretaceous Eocks of Great Britain, 

 published a year ago (op. cit., pp. 260-264), which also seems to 

 have escaped the notice of the two authors just cited. 



[I have procured a copy of Mr. E. M. Brydone's paper, dated 

 August, 1900. It is a pamphlet of 16 pages, and was published 

 separately by Dulau & Co. (price Is.).] 



