After descending this fall, and passing the cottonwood island on which
the eagle has fixed her nest, the river goes on for five hundred and
thirty-two poles over rapids and little falls, the estimated descent
of which is thirteen and one-half feet, till it is joined by a large
fountain boiling up underneath the rocks near the edge of the river,
into which it falls with a cascade of eight feet. The water of this
fountain is of the most perfect clearness, and of rather a bluish cast;
and, even after falling into the Missouri, it preserves its color
for half a mile. From the fountain the river descends with increased
rapidity for the distance of two hundred and fourteen poles, during
which the estimated descent is five feet; and from this, for a distance
of one hundred and thirty-five poles, it descends fourteen feet seven
inches, including a perpendicular fall of six feet seven inches.
The Missouri has now become pressed into a space of four hundred and
seventy-three yards, and here forms a grand cataract, by falling over
a plain rock the whole distance across the river, to the depth of
forty-seven feet eight inches. After recovering itself, it then proceeds
with an estimated descent of three feet, till, at the distance of
one hundred and two poles, it is precipitated down the Crooked Falls
nineteen feet perpendicular. Below this, at the mouth of a deep ravine,
is a fall of five feet; after which, for the distance of nine hundred
and seventy poles, the descent is much more gradual, not being more than
ten feet, and then succeeds a handsome level plain for the space of one
hundred and seventy-eight poles, with a computed descent of three feet,
the river making a bend towards the north.
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