Geology 



represented a former shore-line, and the grits a beach 

 deposit, would therefore appear to be untenable. 



The grit seemed to be the debris of some mass of 

 granite or similar rock, as, even where felspar was 

 absent, some of the cavities between the grains con- 

 tained white powdery Kaolin (china clay), which is 

 known to be a decomposition product of felspar. The 

 third constituent of granite, the mica, was plentiful in 

 the shales associated with the grits. 



As we might be making a somewhat lengthy stay in 

 this neighbourhood more care than usual was necessary 

 in selecting a camping-ground, and we finally chose a 

 velvety lawn, which sloped down to the stream near the 

 entrance to the large cave. This spot was picturesque 

 in the extreme ; on one side of our tents towered the 

 cliff of limestone, 250 feet in height, while to the left and 

 behind us the ground was thickly covered by birch 

 woods. In front the meadow stretched down to the 

 river, and on the opposite bank the birch trees were 

 within a few feet of the water. Willows and alders 

 overhung the river, while behind the woods curved the 

 majestic cliffs of the amphitheatre, now tinted crimson 

 by the rays of the setting sun. 



Thus our temporary home was well protected from 

 the winds, and behind the first row of trees to the left 

 was a long deep pool in the river which formed an ideal 

 natural swimming-bath. A small spring issued near the 

 cliff foot just above the camp and flowed within a few 

 yards of the tents. In fact, the place seemed as though 

 it had been designed for our purpose. 



The final arrangement of the camp had to be left 

 until the morrow, but, in the meantime, we proceeded to 



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