Geology 



the entrance to the tunnel, and, so far as we knew, it was 

 our only way back to the light of day. 



In order to explore the platform we first followed the 

 shore-line to the right, and, at a distance of about 

 100 yards, reached a point where the water washed 

 against the wall of the chamber. Next we followed 

 this wall away from the lake and found that it was 

 nearly vertical up to a height of about 20 feet, when 

 it curved inwards towards the centre of the chamber, 

 the roof of which we were still unable to see, as the light 

 of our candles and torches failed to penetrate the 

 moisture-laden atmosphere. 



Some 70 yards from the water's edge we found 

 an accumulation of stones piled against the wall and 

 forming a rough cone. Shortly after this we came across 

 a canal-like piece of water which emerged from a tunnel 

 and flowed into the lake. Following this we soon found 

 ourselves back at the place where we had left the canoe, 

 having failed to find any way of penetrating farther into 

 the cavern, unless it were by way of the canal at the 

 upper end of the lake. The atmosphere was damp and 

 clammy, and though while moving about we felt un- 

 comfortably hot, we soon began to shiver when standing 

 still, and decided that lunch with some hot soup would be 

 desirable. While this was being prepared by means of 

 our spirit stove we lit up some magnesium wire in a 

 small lamp provided with a reflector, and by its means 

 were able to see the rough dome-like roof some 80 

 feet above us, and to discover that the wall of rock on 

 the far side of the lake was without opening of any kind 

 with the exception of the one by which we had entered 

 and above which the candle was still burning. Clearly 



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