102 
in the yellow clay or cave earth, which abounded with the 
dung of the animals. Mr. Jackson says there was a sill 
stone in front, evidently worn to smoothness by the frequent 
passing of the animals ; and just beyond this point there is 
an opening into a cavern, lower still than the lowest point 
yet reached, and into which the drainage of the cavern now 
flows. Everything points to the probability of a large 
quantity of clay having poured out among the talus at this 
place in very wet seasons, and the clay itself as now found 
is a pasty, tenaceous mass, unlike any naturally deposited 
clay with which I am acquainted. 
Amongst the boulders I found one which is of itself suffi- 
cient to account for the occurrence of boulders without any 
need of a glacial theory. 
It is a smoothly rounded limestone boulder, precisely such 
as is formed by the rolling action of falling water in “ pot- 
holes,” and which cannot have had any glacial origin. This 
boulder occurring as it did with others of black limestone 
and silurian slate, is to my mind perfectly conclusive. 
The point at which the last fiisco very of older bones was 
made, is at least 30 feet in advance of the original entrance, 
and was covered in front with talus. It is however a por- 
tion of the solid cliff, which has remained after all the rest 
had fallen away, and its evidence is conclusive that a very 
large mass has thus fallen since these remains were there 
deposited. The fall of this large mass, containing in its 
fissures clay and boulders from the glacial drift which cer- 
tainly passed over it, would be amply sufficient to account 
for all the drift boulders which actually occur in the talus. 
I visited Victoria Cave three years ago, when the opera- 
tions had newly commenced, and I then found at the top of 
the talus precisely similar boulders to those which have 
