and the other Channel Islands. 17 



sienke which I have been describing seems to be continued as far 

 round the eastern coast as les Burons, where trap is again found. Of 

 this part of the coast I can say nothing more particular. Those 

 shores which are not impracticable are very difficult of access; and 

 that which was accessible was sufficiently various to occupy more 

 time than I was able to appropriate to its examination. 



Further to the north, and on the eastern side, is the port of the 

 Creux. This is a pry beach, in a cove formed by high cliffs of 

 argillaceous rock, of which the faces are absolutely perpendicular in 

 most parts, and as smooth as a wall. Being inaccessible from the 

 land, and at the same time the only secure beach on the island, a 

 communication was formed in 1588 by De Carterets, who excavated 

 a tunnel through the rock ; taking advantage of a loose vein which 

 traverses it. This passage is occupied by a gate, and thus the chief 

 landing place is rendered defensible by a very small force. Th6 

 whole is strikingly picturesque and singular. 



Bridges of detached rocks stretch out to sea from this point, 

 which from the peculiar form of their outline appear to be granite. 



There is a small funnel on the coast resembling the Buller of 

 Buchan or Tol Pedn Penwith : it is called Creux terrible. 1 did not 

 see it. 



From hence to la Noire is an inaccessible promontory, but on the 

 other side of it, is a steatitical vein containing asbestus, and which is 

 probably the continuation of a vein I shall have occasion to notice 

 on the western side of the island at Port des Moulins. 



I also observed a large vein of black porphyry, of a beautiful tex- 

 ture, and capable of a high polish, containing distinct and large 

 concretions of white and pale green felspar. An inaccessible vein is 

 also here visible, of which the lower part has been washed out so as 

 to form a cavern. The upper part which remains, shows blocks of 



c 



