ORIGIN OF THE ANTEDILUVIAN BONES. 
95 
not been in our power to illustrate them by the analogies of other 
caverns now under consideration. From a comparison of these with 
the internal evidence afforded at Paviland, it seems nearly certain that 
the latter are identical in all the circumstances of their diluvial and 
antediluvial phenomena with those of the former; and that occurring 
as they do, in the vertical cliffs that flank the submarine valley which 
forms the estuary of the Severn, they are analogous to the caves we 
find in the equally vertical and not less lofty cliffs that flank the in¬ 
land valleys of the Avon at Clifton, of the Weissent river at Muggen- 
dorf, of the Bode river at Eubeland in the Hartz, and of the Mur at 
Peckaw, near Gratz, in Styria; all being cliffs produced by diluvial 
denudation, and all containing, in a nearly vertical precipice, the 
mouths of caves which are but the truncated extremities of other 
and originally more extensive caverns, which descended from the ante¬ 
diluvian surface, and terminated in the vaults that still remain in 
those portions of the rock which have not been washed away by the 
diluvial waters, from whose action these cliffs have derived their 
origin. By such larger and upper chambers, whose destruction I am 
now assuming (and for the proof of which I must refer to the con¬ 
cluding part of this work), the animal remains may either have been 
washed in at the same time with the diluvial loam and fragments of 
stone, in the midst of which they lie, or have fallen in and perished 
in the period immediately preceding the deluge, and been sub¬ 
sequently drifted onwards to their present place in the lowest re¬ 
cesses with which the upper cavities had communication. The detail 
of the manner in which this latter process may have taken place has 
been already pointed out in my description of the caves at Oreston, 
