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Black Lead Mine 
   
SIR, 
  
I Am very glad that such remarks as I have been able to  
make, are so agreeable to your readers. - For their  
satisfaction I must inform you, that wadd mines in  
the Cumberland Dialect, signifies the black-lead  
mines, being synonymous terms. Their cause and nature  
has employ'd the great Bp Nicolson in two manuscript  
letters, whose opinion, with my own, I intended to transmit  
to you; but as I could not have the opportunity of seeing  
them myself, I defer publication till a better opportunity.  
We are positive the whole world affords not another, nor  
does it appear the Romans ever knew of this. It was  
accidentally discover'd by a tree blown up by the roots in a 
tempest.- 
  
The produce has nothing in common with lead but the name,  
not being fusible in any fire. The mines are seldom opened,  
except a great demand require it; tho' notwithstanding the  
vigilance of the owners, it may be procured from the  
smugglers thereabouts; it sells at 6s. 6d. per lb.  
generally.- 
  
The inclemency of the weather, and rocks of so formidable  
ascent, prevented my intention to see them. 
  
Yours &c. 
  
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