(7) 
proofs of the presence of these interesting relics in our 
Limestone are abundant; and, it appears wonderful, 
‘that they should have remained so long unnoticed, 
or, at least without drawing more attention. 
I cannot therefore better fulfil the design of this 
brief sketch, than by describing, in the first place, 
the leading features,—the characteristic marks and 
properties of our Limestone, as they occur, in the 
following order. For “this purpose, I shall begin 
with its Relative Position and F.rtent. 
The Plymouth bed of Limestone may be regularly 
traced, on the South side, in an uninterrupted line, 
forming, as it were, a barrier against the encroach- 
ments of the sea, from the Passage-house at Cat- 
Down to the Devil’s Point leading into Hamoaze ;* 
and, on the North sede, 1 may mention the following 
‘points, as being sufficiently exact for every purpose I 
have in view. Commencing then from the house at 
‘the Filying-Bridge, it may be traced westward over 
*—I omit mentioning Mount Batten, Hooe Lake, and Oreston, where the lime 
extends, as being the other side of the water, and not coming within the limits 
I have prescribed for my present consideration. 
