160 HY ENA. 
general external conditions of the situation where the 
cavern occurs ; noting whether it was ever probable that it 
was concealed by gravel or angular fragments of rock, which, 
having been subsequently removed by natural or artificial 
causes, a free entrance into the cavern was obtained.” 
“Tf a cavern has remained open to the surface during 
long periods up to the present time, it may have been 
tenanted first by creatures now extinct, and subsequently 
by those now existing; and hence their various remains 
may be detected in it, sometimes mixed, at others in beds 
above each other. Consequently, the remains of Man and 
his works may be discovered in such places, as has been 
the case, particularly in the South of France.” * 
The subjoined vignette gives a view of the mouth of the 
cave at Kirkdale, in the face of the quarry near the brow 
of alow hill, from the engraving given by Dr. Buckland 
in the * Reliquizee Diluviane,” pl. 2. fig. 1. 
* How to observe, p. 182. 
Fig. 62. 
Mouth of the cave at Kirkdale. 
