Royal Mines Act 1688
1688 c.30
An Act to Repeale the Statute made in the fifth yeare of King Henry the Fourth against the Multiplying Gold and Silver.

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I, II. 

 What Mine not adjudged a Royal Mine.
III 
Noe Mine of Copper Tin Iron or Lead shall hereafter be adjudged reputed or taken to be a Royall Mine although Gold or Silver may be extracted out of the same.