recognized in all the general descriptions of the veins of this region.
The associated minerals are, here, _cuprite_ or yellow copper, green
_malachite_ or carbonate of copper, _mispickel_ or arsenical pyrites,
_zinc blende, sesquioxyde of iron_, rich in gold, and also frequent
"sights" or visible masses of gold itself. The gold is also often
visible to the naked eye in all the associated minerals, and
particularly in the mispickel and blende.

The main quartz vein of this interesting lead varies from three to ten
inches in thickness at different points on the surface-level, but is
reported as increasing to twenty inches thick at the bottom of the
shaft, already carried down to a depth of forty feet. This very
considerable variation in thickness will be found to be owing to the
folds or plications of the vein, to which we shall hereafter make more
particular allusion.

The minerals associated with the quartz in this vein, especially the
cuprite and mispickel, are found most abundantly upon the foot-wall
side, or underside of the quartz itself. The smaller accompanying vein
before alluded to appears to be but a repetition of the larger one in
all its essential characteristics, and is believed by the scientific
examiners to be fully as well charged with gold. That this is likely to
come up to a very remarkable standard of productiveness, perhaps more so
than any known vein in the world, is to be inferred from the official
statement in the "Royal Gazette" of Wednesday, January 20, 1864,
published by authority, at the Chief Gold-Commissioner's office in
Halifax, in which the average yield of the Montague vein for the month
of October, 1863, is given as 3 oz. 3 dwt. 4 gr., for November as 3 oz.
10 dwt. 13 gr., and for December as 5 oz. 9 dwt. 8 gr., to the ton of
quartz crushed during those months respectively. Nor is the quartz of