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Valley, is almost filled with lhmonite of a dark brown and orange 
colour ; indeed, it is so plentiful, that an attempt was made a few 
years ago to mine and send it to market as a pigment, but the cost 
of carriage rendered it impracticable. A considerable quantiy of 
limonite also occurs in some of the veins in the Glenderaterra 
valley. 
There are several important veins in the last named valley, and 
one of the number no doubt occupies the great fault fissure which 
has formed the line of weakness, along which the valley has been 
excavated. This vein bears some resemblance to the Caldbeck 
Fells veins with regard both to the number and character of the 
minerals it contains, consisting of the ores of lead, copper, zinc, 
and iron, together with large quantities of friable quartz, and a 
little barytes and chalcedony. Some of the ores are decomposition 
products. The mining operations on this vein are of a superficial 
character, and very little ore has been raised. A shaft was sunk 
on one portion of it to a depth of thirty fathoms, and levels were 
driven off north and south at fifteen fathoms below the surface, 
and two more at the bottom of the shaft, but not to any great 
distance ; and from these workings about one hundred tons of lead 
ore, and four or five tons of copper ore were raised. Some lead and 
copper ores were also obtained from a level about fifty fathoms north 
of this shaft. A little lower down the valley another shaft was sunk 
a few fathoms, and some ore was obtained from it. It appears that 
wherever these veins have been worked a little ore has been found, 
but hitherto they have not yielded sufficient to cover expenses. 
The whole of these works are either in the chiastolite slate, spotted 
schist, or mica schist adjoining the granite in Syning Gill, and it is 
much to be regretted that there is not sufficient ore to render the 
works profitable, and cause deeper and more extensive excavations 
to be made in these interesting metamorphic rocks; which, no 
doubt, bear the same share in the formation of the decomposition 
products in the Glenderaterra veins as that borne by the igneous 
rocks in the Caldbeck Fells District. 
Proceeding further to the west we come to the great vein of 
Skiddaw, which stretches from near Ravenstone to Lonscale, along 
