Mr. William Phillips on the Veins of Cornwall, 155 



that in some part of Dunkin's vein, granite was found on one side 

 of it and schist on the other, and that detached masses of each sub-- 

 stance were found both in it and in the South vein ; and frequently, 

 that where granite formed the country on each side of the vein, 

 the masses were of schist, and vice versa. 



Description of some of the Veins in the Mines called Tol Carn^ 

 Huel Jewel^ and Huel Damsel^ near St. Die. 



PI. 6. Fig. 1. 



The veins of these mines are remarkable in several respects. 

 A small brook was the boundary between Huel Jewel, which had 

 been worked about fifty years at an immense profit, and that of an 

 untried mine called Tol Carn, near St. Die. The veins of Hue! 

 Jewel were very rich in those parts which adjoined Tol Carn 

 mine. This, of course, raised the expectation of the adventurers 

 in the latter to an extraordinary pitch, and they set to work in the 

 full belief that they should be at little trouble and expense in 

 realizing on their side the brook, a continuation of the riches on 

 the other side, as the veins of Huel Jewel made immediately for 

 Tol Carn mine. On sinking a shaft in order to cut one of them 

 at a certain depth, they were surprised at not doing so, since from 

 knovang the precise run of the vein, the miner is generally able to 

 make nice calculations in point of depth and distance in the 

 sinking a shaft. After this had been done, as far as it v/as deemed 

 proper, they drove through the country, at right angles with the 

 shaft, from north to south, several fathoms without finding the vein. 

 It was then attempted, by sinking shafts, to cut the other two veins 

 Yvhicb formed a pait of the workings of Huel Jewel, but without 



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