Mr. William Phillips on the Veins of Cornwall. 149 



Cross Course which traversed the Manor Old Load, and was first 

 noticed at about 116 fathoms from the surface: the Cross Course 

 was at that place about 2^ feet wide, but was narrower above, and 

 consisted of quartz accompanied by a continuous flucan, which also 

 was found with the silver. For some fathoms in depth after the 

 first discovery of the silver, the Cross Course consisted for about 8 

 or 9 feet, and in some places for 3 fathoms, north and south of its 

 junction with the Manor Old Load, of silver mingled with sulphuret 

 of lead, iron pyrites, bismuth, cobalt, wolfram, &cc. and these sub- 

 stances continued to abound and to traverse the copper load so long 

 as it was rich while in contact with the cross vein. 



It was noticed in the paper of Mr. Hitchins above alluded to, 

 that the Rusty Cross Course, next on the east to Convocation Cross 

 Course, also produced some silver, although not in sufficient quan- 

 tity to pay the expenses of procuring it. This cross course con- 

 sisted of quartz accompanied by a vein of flucan, sometimes on one 

 side of it and sometimes on the other, together with iron pyrites 

 occasionally. 



The extent north and south of the channel of porphyry, or, to 

 use the miners term, of elvan, which forms so conspicuous a feature 

 in the section of Pleasure, Fancy and North Herland veins, is not 

 known. Its effect in compressing the east and west veins is worthy 

 of attention, and is noted on the ground plan, which, together with 

 the accompanying sections are given from original documents now 

 in my possession. 



Section of Pleasure^ Fancy ^ and North Herland Copper Mines. 



PI. 8. fig. 10. 

 The mines united under the name of Herland and Drannack 

 were formerly worked separately, but were united on account of 



