206 ON THE REVOLUTIONS 



to which I have so often alhided in the valley of Geneva : the 

 largest of these is known by the name of the Carnwhaple- 

 stone. The appearance of the country induces me to imagine, 

 that they had been lifted out of the loch by some concentrated 

 foi'ce of the returning stream. 



A number of large blocks of granite also occur on the hill, 

 at the Pass of Stanmore, in Cumberland, which I was at pains 

 to trace to their source, and found it to be a rock called the 

 Westledale Crag, which is a granite of the same quality with 

 them. 



A single block of granite, of four or five feet in diameter, 

 occurs in the street of Darlington. 



The transportation of such blocks does not seem to have 

 happened very frequently in Great Britain, at least in those 

 parts of it with which I am acquainted ; and where they occur, 

 in the neighbourhood of Edinburgh, they are generally embed- 

 ded in the blue diluvian clay. That water, however, in the 

 circumstances which we have supposed, does possess the power 

 of transporting very large blocks, we learn by a direct proof, 

 in what was done at Cadiz by the wave which accompanied the 

 earthquake in 1755. It broke down a large piece of the ram- 

 part, and carried solid masses of masonry, of eight or ten tons 

 weight, to the distance of forty or fifty yards, as we learn by 

 the account of Mr B. Bewick, {Philosophical Transactions^ 



vol. XLIX.) 



The 



