Mr. R. D. Darbishire, F.G.S., referred to a paper a On 
the Existence of a Seabeach on the Limestone Moors near 
Buxton’’ (Trans. Manchester Geol. Soc ., V., p. 273), in which 
Mr. John Plant, F.G.S., had described as sea beach the sur- 
face of the limestone rock as the same is seen when bared of 
sward and surface clay above the quarries on Grin Edge and 
Harper Hill, south-west of Buxton, and to Mr. Plant’s con- 
jecture that this worn surface probably extended nearly to 
the crown of the hills. 
His own observation had marked on each hill, above the 
stratum whose upper surface exhibited those indications 
of wear, a stratum of somewhat different texture still sub- 
sisting in the shape of a slight vertical cliff or reef. This 
bed had not worn in the same manner as the “ beach,” that is 
to say, with many interlacing fissures leaving a close chevaux 
de frize of limestone points, but rather in great blocks with 
round, curved edges or holes. 
In connection with this bed Mr. Darbishire had obtained 
specimens from each hill exhibiting what he believed to 
be the remains of the burrows of Pholas shells. 
On the top level of Grin Edge, close to the ruins of the 
tower, one stone had a group of seven holes. They were 
placed like Pholas holes as he had collected them on Great 
Orme’s Head ; and, though the surface of the stone about 
them was much worn, taken along with the specimen next 
described, it seemed more fitting to ascribe to them a simi- 
lar origin than to attribute them to the natural wear of the 
stone, notwithstanding the variety and singularity of many 
of the forms in which atmospheric or aqueous corrosion 
affect the limestone rock. 
This stone lay amongst a heap of others near the ruins of 
the tower, and had doubtless been brought up a few feet. 
The height above the sea of the tower is stated on the 
Ordnance Map as 1,435 feet. 
On Harper Hill, in two large blocks of the overlying 
