Green—On Ice-scratches in Derbyshire. 441 
Stone’ is just a case in point, lying as it does in the valley of the 
Derwent, about seven miles below the junction of the Wye with that 
river. I was, therefore, extremely glad to see Mr. Mackintosh’s 
letter just in time to pay a visit to the spot, and I shall tell as care- 
fully as I can what I there saw, in hopes that more experienced 
ice-men, if they cannot go to see for themselves, may be enabled to 
decide whether we can fairly refer the markings in question to the 
action of ice. 
The spot is easily found. A bridle-road leads over the hills from 
Cromford to Bonsall, and following this we reach on the crest of the 
ascent, just below where the word ‘ Rugs’ is written on the Ordnance 
Map—a boss of limestone studded with dark-red patches, whence its 
name of ‘ The Bloody Stone.’ * These patches are of chert, polished 
down to a smooth surface, and scored over with grooves and scratches. 
At first sight it looks as if the limestone was covered with a very 
thin layer of chert, which has here and there been worn or weathered 
off; but closer examination shows us that each patch is the section 
of a chert-nodule imbedded in the rock, the upper part of which has 
been ground away (see fig. 3). Fig. 1 is a ground-plan, and fig. 2 
Pathway. 
Fic. 1. GROUND-PLAN OF ‘THE BLOODY STONE.’ 
Fig. 2. SECTION across Fie. 1, rRom H. To K. 
a section of the rock, both on a true scale. Starting at the highest 
point, we find a small ledge of rock (A) jutting up from the turf: 
the northern face of this, which dips N. 19° E. at 35°, is scored by 
deep grooves running KE. 19° §.: this is the only case where markings 
are found on the é2mestone. Next we come to a boss of limestone (8), 
on the north-western face of which are chert-patches, such as have 
been just described, polished and marked by grooves running S. 30° E. 
* These patches probably gave the name originally, and the fact, or legend, of a 
man having been thrown from his;horse and killed Lere, was applied or invented to 
account for their presence. 
