EDDY : LEAD VEINS. 
07 
The main vein above the upper adit widened out, and for a 
very short length on the north-we»st and near to Garforth's shaft 
was worked open to the surface. 
The matrix of the vein being principally sulphate of barytes 
(heavy spar), and the substance of the wide part of the vein being 
intersected by ^'slants" or clay joints, the "stopping," or removing 
of this ground entailed considerable danger to the miners. In one 
part of the ground over the top level the vein-stuff was practically 
stratified, the matrix coming away in beds of one to three feet in 
thickness. 
Besides the sulphate a lesser quantity of carbonate of barytes 
or "witherite" has been obtained. These with ochreous-marl, 
some calcite and much black clay have been the principal contents 
of this lode. 
It is ])robably due to the large deposit of sulphate of barytes 
in the upper portion of this vein, that the water percolating through 
the mass of vein-stuff is so charged with sulphuric acid as to dissolve 
the good iron out of the tram rails, leaving the cinder in thin 
parallel plates as a tribute to the ability of the iron -master to 
manipulate other than good iron. 
It is apparent that the main portion of the deposit of ore in 
this vein crops to the surface in the east-central part of the ground 
near Garforth's shaft, and dipping to the north-west is probably 
cut off by the " fault " known to range westwards, with the north 
side down. 
The remainder of the deposit has been denuded and removed 
from the eastern and more elevated part of the ground, and I see 
no good reason for expecting that at any future time lead ore will 
be discovered in quantity further to the south-east. 
The ore yielded by this vein was almost entirely the sulphide 
of lead, (or galena,) principally disseminated amongst the matrix of 
the vein throughout the width of the lode, and not often in solid 
masses. Being mixed with heavy barytes and some iron pyrites, 
the separation of the ore from the impurities w^as difHcult, and its 
