Veins in the Mine of Huel Peever. 141 



By a reference to the accompanying ground plan of the mine, 

 PI. 7, fig. 1, it will be seen that it consisted of one tin vein a and 

 one copper vein b ; the latter called John's Gossan, running in 

 the direction of east and west, and forty fathoms south of the 

 former ; two other veins c and d not metalliferous, took the same 

 direction, one 25 fathoms south of the copper vein, and the other 

 23 fathoms still further south. Mary fathoms north of the tin vein, 

 but at what exact distance is not precisely known, a channel of por- 

 phyry f, or in the language of the miner, of el van, also ran in the 

 direction of east and west, and a copper vein e near it. It will also 

 be seen that there were three cross veins, not metalliferous, techni- 

 cally called cross courses, the easternmost of which x runs from 

 10 degrees west of north to 10 degrees east of south, that next to 

 it jk, about 9 fathoms to the west, runs a little more to the west of 

 north, and east of south. The precise direction of the westernmost 

 js, which was 145 fathoms distant from that next to it on the east, 

 is not known ; nor is that essential to the present object, since as it 

 formed the utmost limits of the workings of the mine on the west, 

 and was situate in the poorest part, it was not found to contribute 

 any thing towards the strange circumstances which have rendered 

 the history of this mine so well deserving of detail and preservation. 



The tin vein a is from three to thirty feet wide, but its general 

 average may be estimated at about eight feet. The copper vein b is 

 about three feet wide. It is almost needless to observe that these 

 veins were not equally productive in every part ; in some places, 

 they were very rich, in others quite poor ; but it is worthy of notice, 

 that where the tin vein was thirty feet wide, its substance consisted 

 of a mass of rich tin ore extending several fathoms in every direction. 

 The substances enclosed in the copper vein, consisted, near the sur- 

 face, of quartz and iron ochre, or gossan, amongst which was inter- 



Vol. IV. T 



