120 
about two inches wide was discovered, bearing a south- 
east course, which cuts the lode at an angle of about 45°, 
and heaved and disordered it. 
<¢ At the depth of 12, 25, and 50 fathoms, nothing was 
discovered in the lode but the cavities from which the ore 
was taken away during the former period of working the 
mine. At 60 fathoms in depth were found, close to the 
flookan, a great number of angular fragments of Schist 
cemented by the same substance. At the depth of 75 fa- 
thoms the flookan became 4 inches wide in the shaft, and 
continued of that size for 10 fathoms; it then became di- 
vided into four parts or branches, each diverging from its 
former course, and in this state it continued through the 
lode, of which the first three feet were composed of Copper 
Pyrites, and then was discovered a body of Pebbles nearly 
twelve feet square, extending in width to the extreme 
branches of the flookan. In this part of the lode the Schist 
greatly predominates ; of course the pebbles are generally 
composed of Schist, cemented in some parts by the same 
substance or Chlorite, in others by Oxide of Tin, which is 
generally crystallized ; and in some of the crevices there is 
a little Copper Pyrites. It is singular, that a few pebbles, 
perhaps not more than half a score, were found of quite a 
different nature from the others; they were composed of 
Tin in Quartz coated with Chlorite. The pebbles did not 
continue in a body to the height of more than two fathoms ; 
but scattered bunches and single pebbles were found four 
fathoms above, and six fathoms below the place in which 
they were first discovered. 
“¢ Tt is only necessary to add, that the lode has since been 
worked fifteen fathoms deeper than where the pebbles 
occurred ; it there consists for the most part of Chlorite, 
in a regular manner; not the least trace of pebbles is to be 
seen, nor indeed of any disturbance in the strata.” 
Merely rounded pebbles of Slate would, to a common 
observer, appear extraordinary. Here we see the particular 
