1382 CAPTAIN TUCKEY’S NARRATIVE, 
exactly the shape of a mushroom, consisting of a round co- 
Jumn 18 inches high, surmounted by a domed head two feet 
in diameter. 
We this morning observed a curious optical illusion, 
caused doubtless by the state of the atmosphere and the 
shadows of the high hills, the boats appearing to be placed 
on the pinnacle of an elevated mass of water, from which 
the descent was rapid on every side, so that in looking up 
the river the current seemed to be running up hill. By 
moonlight the reach we anchored in much resembled Loch 
Tay in Scotland. The rise of water in the wet season was 
here observed on the rocks, having worn two grooves, 
the first 8 feet above the present level, and the second and 
faintest 95 feet. The nature of the hills, as well as their ap- 
pearance, prove that they do not absorb any of the waterthat | 
