39 
Mr. Mills's mineralogical Account , &c. 
by Prince John, during his command of his father's forces in 
Ireland ; which grant was renewed and confirmed by Queen 
Elizabeth, and again by King Charles the Second. 
The summit of the mountain is the boundary between the 
counties ofWicklow and Wexford ; seven English miles west from 
Arklow, ten to the south-westward of Rathdrum, and six south- 
westerly from Cronebane mines; by estimation about six hun- 
dred yards above the. level of the sea. It extends W by N and 
Eby S, and stretches away to the north-eastward, to Ballycoage, 
where shafts have formerly been sunk, and some copper and mag- 
netic iron ore has been found ; and thence to the NE there ex- 
tends a tract of mineral country, eight miles in length, running 
through the lands of Ballymurtagh, Ballygahan, Tigrony, 
Cronebane, Connery, and Kilmacoe, in all which veins of copper 
ore are found; and terminating at the slate quarry atBalnabarny. 
On the highest part of the mountain are bare rocks, being 
a variety of argillite,* whose joints range NNE and SSW, 
hade to the SSW, and in one part include a rib of quartz, 
three inches wide, which follows the direction of the strata. 
Around the rocks, for some distance, is sound ground, covered 
with heath ; descending to the eastward, there is springy 
ground, abounding with coarse grass ; and below that, a very 
extensive bog, in which the turf is from four to nine feet thick, 
and beneath it, in the substratum of clay, are many angular 
fragments of quartz, containing chlorite, and ferruginous earth. 
Below the turbary the ground falls with a quick descent, and 
three ravines are observed. The central one, which is the 
most considerable, has been worn by torrents, which derive 
their source from the bog ; the others are formed lower down 
* Kirwan, Edit, 1794, p.234. 
