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lowest point in its brim, which happened to be not at the region 
of the old valley, but at the site of the present gorge. This 
stream, probably at first but a small brook, following the line of 
least resistance, gradually wore for itself a tortuous channel, 
sinking it deeper and deeper as the years went by," until it 
ormed and is still forming for itself the deep channel known as 
Fic, 35. Lower fall, looking up-stream from table rock, the separation into two 
cascades clearly s 
