156 BRECCIA OF TWO ERAS—RED DILUVIAL LOAM AND 
concretion are probably the remains of the food of those birds. At 
the base of the rock below Kings Lines, the concretion consists of 
pebbles of the prevailing calcareous rock. In this concretion, at a 
considerable depth under the surface, was found part of a green glass 
bottle.” 
The above extracts need but little comment. The birds' bones at 
the rock of Princes Lines, and the glass bottle buried under pebbles 
at the base of Kings Lines, show that there is still going on daily a 
formation of postdiluvian breccia; whilst the whole description of the 
earthy contents of the caves and fissures, and of the manner in which 
they are filled, is so entirely like that I have given of the caves and 
fissures of Germany and England, that it seems to me impossible to 
hesitate in admitting the identity of their origin. But the proof 
(satisfactory as it is) does not stop here; I would attribute, in this 
case, as in the caves at Plymouth, the introduction of the loam and 
pebbles to diluvial action superinduced upon bones and angular frag¬ 
ments, that had fallen into the cavities whilst yet open, in the period 
preceding the last general inundation of the earth; and in the paper 
I have just quoted, Major Imrie has supplied one of the most neat 
and convincing proofs I ever met with, that this same diluvial action 
has been exerted on the summit of the very mountain whose fissures 
I am contending have been filled by it. Describing the upper surface 
of this mountain, he says, “ The uncovered parts of the rock expose 
to the eye a phenomenon worthy of some attention, as it tends clearly 
to demonstrate, that however high the surface of this rock may now 
be elevated above the level of the sea, it has once been the bed of 
agitated waters. This phenomenon is to be observed in many parts 
