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of Limestone, with an intermediate bed of Shale. It is a dome- 
shaped oblong elevation, composed entirely of Silurian Rocks, 
which have been squeezed by lateral pressure into their present 
form. There is a central nucleus of lower Shale on which 
repose the Limestones dipping every way at considerable angles 
from the centre of the hill. On the south-west side the beds 
curve round very symmetrically, dipping west, south-west, and 
south, at an angle of about 40°. Similarly on the north-east 
side, the two Limestones are symmetrically curved, dipping 
east, and north-east, and finally almost north at about 45°. 
Along the east and south-east sides of the hill, the inclination 
is much steeper, rising from 50° to 60°, and in one part to 
upwards of 80°. At the south-east corner the beds are broken 
by a fault, so that the end of the upper Limestone on the west 
of the fault abuts against the lower Limestone on the east 
side of it. The upper Limestone measures 28ft. 4in., the 
intermediate Shale 90 ft., and the lower Limestone is 42 ft. 3 in. 
thick. The Limestone beds have been quarried for many years, 
and the hill has been mined in other parts. Buttresses of rock 
have been left to prevent the inclined strata from falling, so 
that arches and caverns are seen on the west side of the hill. 
One road passes under the arches of rock, and some charming 
bits of landscape were observed here to perfection; the high 
lights gleaming through the brilliant green foliage against the 
blue sky, as seen from the rocky arch below, had a marvellous 
effect for all those who delight in natural beauties. 
The limestones belong to the Wenlock series and contain 
a large assemblage of fossils. Many corals were found as the 
party moved along; but all who desire to see what the Wenlock 
Limestone at the Castle Hill has produced, should visit the 
museum at Dudley. There are several large cases full of very 
fine specimens of “‘crinoids” or sea-lilies, with their expanded 
arms, and long many-jointed stems. The beauty and perfection 
of many of these specimens can only be appreciated by the 
paleontologist, but as natural objects, even to the unlearned, 
they are marvels of beauty. There is likewise a good collection 
of the “ Trilobites”” for which Dudley has long been famous, 
