of Devonshire and CornivalL 167 



E. Estimate of the number of Mines in Coniwally of the different 

 kinds of ore they contain^ and of their relative ages. 



Most of the data on which the facts comprehended in this para- 

 graph are founded, I obtained from a MS map of the mines of 

 Cornwall, executed by Mr. William Phillips in the year 1800. This 

 map is very interesting, and ably executed in all respects, but there 

 are several omissions in it, which may be easily accounted for, as the 

 state of the mines varies from year to year. Old workings are given 

 up, and new mines are daily opening ; what follows therefore is to 

 be understood in a relative and not in an absolute sense. 



Without taking into account the tin stream-works already men- 

 tioned, and the mines of soap-stone, which is a particular object of 

 itself, there were about the year 1800, ninety-nine mines worked 

 in Cornwall.* 



Of these, there were forty-five of copper, twenty-eight of tin 

 eighteen of copper and tin, two of lead, one of lead and silver, one 

 of copper and silver, one of silver, one of copper and cobalt, one of 

 tin and cobalt, and one of antimony. To which we may now 

 add, some mines of manganese which were not worked at that time. 



Of the copper mines, eleven are in the parish of Gwennap 

 alone, six in that of St. Agnes, five in Camborne, four in Gwinear, 

 the same number in St. Hillary, three in Germoe, Crowan and 

 lUogan, and two in St. Neot. The other mines are scattered singly 

 in parishes more or less distant from each ether. 



Of the tin mines, seven are in the parish of St. Agnes, four in 

 Wendron, three in Gulval, two in Lelant, Redruth, and Perran- 

 zabuloe, and only one in the parish of Gwennap, where most of the 

 copper veins are found. 



* According to Mr. Phillips's map. 



