160 



HY^NA. 



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/ 1 



" If 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 a low hill, from the engraving given by Dr. Buckland 

 in the "Reliquiae Diluvianse," pi. 2. fig. 1. 

 * How to observe, p. 1 82. 



Fig. 62. 



Mouth of the cave at Kirkdale. 



