Geology 



at any of the numerous springs at the foot of the escarp- 

 ment, which had been carefully watched during our 

 absence by the party left in camp. 



Although a regular patrol had been kept up daily, 

 no trace of colour had as yet been seen, and as no 

 further experiments of the kind could be attempted until 

 this lot of colouring matter had been traced and had 

 become exhausted, we decided to rest for a few days, 

 and spent our time in fishing and shooting, meanwhile 

 keeping a sharp look-out on the springs. 



At last, on the afternoon of the tenth day after the 

 introduction of the fluorescein at Lake Sink, one of the 

 party who had been fishing in South Fork came into 

 camp and reported that that stream was brilliantly 

 coloured. We at once set out for the stream, and 

 followed it up to the junction of East Burn, down which 

 the green water was found to be flowing. The colour 

 was eventually traced to the large springs which issued 

 at the foot of the escarpment on the north bank of the 

 burn. 



Referring to the map, we found that the course 

 taken by the underground water was almost due south, 

 which we remembered was also the direction of the 

 large cave near the camp. 



None of the other springs was affected, and as after 

 a further lapse of twenty-four hours the water was once 

 more clear we made ready for our attempt to descend 

 Funnel Sink. 



Every available rope with the exception of one long 

 length of thin, but strong mountaineering rope had been 

 made into rope ladders, and had been transported to a 

 comfortable hollow near the sink, and here we repaired 



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