of the Neighbourhood of Edinburgh » S57 
the same thick bed> only separated by the cotemporaneous in- 
cluded bed of drawing-slate. 
The greenstone near to St Bernard’s Well, on the Water of 
Leith, is disposed in veins that traverse the strata of the coal- 
field. There are two veins, an upper and lower, from three to 
four feet wide ; the lower vein, or that immediately beside the 
well, is beautifully amygdaloidal, owing to imbedded portions 
of calcareous-spar. 
The greenstone at the Custom House is part of a great vein 
which has been traced in a nearly easterly direction, crossing the 
coal-field from the neighbourhood of the Custom House, until 
it disappears under the soil near the sea shore. It varies in 
breadth from 60 or 70 feet to 40 feet, is nearly perpendicular, and 
its known length about two miles. The greenstone quarries 
in its line of direction are Broughton, Leith Walk, nearly oppo- 
site Gaj^field Place, new road across the north foot of the Calton 
Hill, old quarry also in the north foot of the Calton Hill, in 
Marshall’s Entry, and east side of the Restairig road. 
In the greenstone at the Custom blouse, branches or veins of 
greenstone were observed shooting from the sides of the great vein 
into the bounding sandstone and slate-clay, and these either inter- 
sected the strata or were parallel with them ; in the latter case 
having the appearance of beds. Portions of the sandstone and 
slate-clay were imbedded in the greenstone, and frequently at the 
line of junction of the rocks, there were mutual intermixtures. 
The greenstone contained disseminated iron-pyrites and calca- 
reous-spar, and also the same minerals in the form of veins. In 
some parts of the vein the mass was entirely composed of grey- 
coloured compact felspar, and these masses irregularly distri- 
buted in the greenstone, gave it a conglomerated character. 
Although some of the quarries in other parts of the vein are be- 
yond the limit of the present rising ground, it may not be unin- 
teresting to give a short account of them. 
The greenstone quarries at Broughton and Leith Walk are 
now covered up. 
The greenstone in the quarry in Marshall’s Entry, now filled 
with water, exhibited the same phenomena as in that at the Cus- 
tom House. The greenstone in some parts is compact and dark- 
coloured, forming the basaltic greenstone of mineralogists ; in 
