FOUND IN DERBYSHIRE. 129 



are for the most filled with sulphate of lime. All these 

 instances appear to show that the vein stuff found in the 

 veins, generally varies with the nature of the rock in which 

 it is found ; a circumstance first noticed, I believe, by Sir 

 H. T. De la Beche. In the present instance, the want of 

 the vein stuff seems to show that the metal has not been 

 separated from the rocks which enclose it, but that it has 

 been introduced into the fissure in a state of solution, un- 

 mixed with other mineral substances, and then precipitated. 

 The second fact above alluded to, namely, the bright con- 

 dition of the coal in contact with the lead, seems clearly to 

 prove that the lead could never have been injected into the 

 fissure in a hot state, or the coal would have been coked and 

 burnt in a similar manner to that which has occurred where 

 a whin dyke has gone through a seam of coal, many 

 instances of which have been met with in the Newcastle 

 and other coal-fields. As previously stated, the miners of 

 the neighbourhood believe that the vein of lead crosses 

 Edale. If this be true, the direction of its course north- 

 eastwards points towards Balterstone chapel, near which 

 place the late Mr. Farey, in vol. i. p. 270 of his survey of 

 Derbyshire, in his list of mines, gives the following : 

 <« Wigtwizle, near Balterstone chapel, N.W. of Sheffield, 

 Yorkshire, in grit (perhaps alluvial), lead, black jack, cop- 

 per." The grit here alluded to is either the rough rock, 

 or one very near in position to it, similar to the lowest grit- 

 stone in the accompanying section. About ten years ago a 

 vein of sulphuret of lead, said to be very rich in silver, was 

 found near to Balterstone, atDeepcar,in lower coal measures; 

 but as it only occurred in detached bunches, similar to 

 Mr. Gisborne's above described, it was not worked to any 

 great extent. 



