C 574] 
derate. My guide got up upon a fecond eminence, 
but told us he was difled, and could advance no fur- 
ther ; and indeed his torch was going out. This 
fecond eminence, or riling, is likewife formed by 
dones falling from the vault. They are a kind of 
whitilh free- done, covered and incruded with a very 
fharp, white, aluminous fait. I then took a torch, 
and having left a negro at the entrance with another 
torch to fetch us out, in cafe of need, we entered the 
the third cave. Here the heat is excedive, the torch 
gave no light, and was almod extinguidied for 
want of air, fo that we were obliged to wave it about 
continually. We could hardly fetch breath, and 
were covered with fwcat, and found nothing re- 
markable but this violent heat. The vault end9 
here, and we could go no further. We perceived 
on the left, at coming in, a great hollow place, where 
we heard the falling of water ; we imagined the vault 
continued on that fide, and depping down were 
agreeably furprifed to find it cool, and that our 
torches revived. The fpace of one fathom made 
this alteration; for holding our torches in the right 
hand extended, they could hardly burn ; whereas ;n 
the left dretched out, they burnt very clear This 
puts me in mind of what happens in the Grotta cic 
Cani y near Pozzuolo in Italy, deferibed by Milfon, 
vol ii. p. 63. let. 23. too long to be related here. 
I went down to the bottom of this hole, where I 
found nothing but a furprizing cool air. Afterwards 
we found feveral holes full of water, lefs impregnated 
with fait and a’um than that at the entrance. When 
w r t came up again, in order to proceed on our way, 
we were fuffocated with the fame heat we had felt in 
coming 
