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but it is the opinion of a very competent judge, Mr. Pengelly, 
that much remains to be explored, if only a sufficient sum 
could be raised for the purpose. The cavern goes on ex- 
panding as it descends, and attains a greater extent towards 
the bottom of the hill. It branches out into many recesses, 
which, from the remains found in them, have been called by 
Mr. M'Enery, the Bear's Den, the Wolf's Passage, the Cave of 
Rodentia, the Cave of Inscriptions ; but as no plan accompa- 
nies his work, it would be useless to attempt to give an idea 
of their relative position. A more important point, as 
throwing light upon the history of its contents, is the 
vertical order in which they succeed each other. According 
to Mr. M'Enery, the ancient rocky floor of the cavern was 
inhabited by bears and hyaenas, as well as by rodentia, such 
as water-rats and shrew mice, but chiefly by hyaenas, who 
left in it not only their own bones and other traces of their 
existence, but those of animals which they made their prey ; 
in this respect closely resembling Kirkdale. He supposes 
that, while it was in this state, a body of mud and gravel 
rushed into it, covering the bottom, and enveloping in it 
the organic remains which lay scattered about. This appears 
to have come from the land, not from the sea ; for it contains 
no marine exuviae, but fragments of the formations of the 
adjacent country, and rolled pebbles of the granite of 
Dartmoor. But, though it entered with a violent rush, the 
agitation did not continue long ; the bones bear no marks of 
any long friction. The masses of rock and heavier bones 
sunk to the bottom ; the lighter remained in the upper part. 
No similar second irruption of mud and gravel could be 
traced ; and as Buckland's " Reliquiae Diluvianae," recently 
published, had given currency to the opinion that all such 
phaenomena were attributable to one great historical event — 
the Deluge, the mud was called by him diluvial, and every- 
thing of subsequent age, postdiluvial. 
