300 THE PARALLEL ROADS OF GLEN ROY. [l879. 



This morning I by chance opened the vol. of Min. Proceed. 

 Inst. C. E., just received, vol. Iv. for 1878-79. In it, at p. 339 

 you will find a paper on " Slips in Clay Soils." ... A very close 

 approach to my theoretical diagram. I really see no other ex- 

 planation, and see only an inevitable consequence. 



J. F. Campbell to J. Prestwich. 



NIDDRY LODGE, KENSINGTON, LONDON, W., 7th May 1879. 



MY DEAR PRESTWICH,: Somebody once quoted St Paul to a 

 German, who said, " Oh yes, I know. He was a very clever man, 

 Paulus, but I do not agree with Paulus." I have the greatest 

 respect for your opinions as your former Secretary in the Coals 

 and otherwise, but I am hopelessly convinced that the Lochaber 

 roads are ancient sea margins. 



Darwin was so convinced till somebody assured him that there 

 are no such beaches on the side of the watershed. There are, 

 as I have assured you, but you do not believe. I have a paper 

 from a man about British Columbia which goes in for American 

 submergence equal to the European submergence for which I 

 have gone in. But my last paper will probably be my last sent 

 to the Geological Society, and I shall die disagreeing with you, 

 an authority, and with pundits generally who go in for Glacial 

 periods. Thanks for the paper. Unless you ask for it I will 

 keep it with my own on the same subject. I am, yours very 

 truly, J. F. CAMPBELL. 



The following note from Charles Darwin, although of 

 later date, is inserted here, being also on the subject of 

 the Lochaber Parallel Roads : 



C. Darwin to J. Prestwich. 



DOWN, BECKENHAM, KENT, 3rd Jany. 1880. 



MY DEAR PROF. PRESTWICH, You are perfectly right. As 

 soon as I read Mr Jamieson's article on the Parallel Eoads I gave 

 up the ghost with more sighs and groans than on almost any 

 other occasion in my life. Believe me, yours very sincerely, 



CHARLES DARWIN. 



