20 AT THE NORTH OF BEARCAMP WATER. 
into a black cavern beneath, making a whirlpool 
in the darkness. The temperature under this 
ledge was nearly forty degrees lower than on 
the top of the bank a few yards above. Stand¬ 
ing by the ledge, I counted nine distinct cascades 
varying from three to six feet in height. One 
of them was an ideally symmetrical fall, for the 
whole body of water, gathered between two 
rocky faces, fell into a deep round pool just at 
its centre. Another fall showed clearly why the 
water under a cascade looks white. The water 
poured into a very broad, deep basin at its upper 
corner, leaving most of the surface undisturbed; 
and between the limpid falling water and the 
flat face of rock behind it air was caught and 
sucked downward by the flow. It was carried 
to the very bottom of the pool, where, breaking 
into small round bubbles, it struggled to the sur¬ 
face. Strings and masses of snow-white bub¬ 
bles filled the area in front and at each side of 
the fall, while some were drawn some distance 
down-stream by the escaping water. These 
bubbles, when under water, produced the white¬ 
ness of the pool, and, on reaching the surface, 
burst and made a large part of its foam and 
spray. In this pool, as in many others, small 
trout hovered about the edge of the rising bub¬ 
bles, seizing upon everything which looked like 
food. They rose with charming promptness to 
