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.

Thence it descends, for four hundred and eighty poles, about eighteen and one-half feet, when it makes a perpendicular fall of two feet, which is ninety poles beyond the great cataract; in approaching which, it descends thirteen feet within two hundred yards, and, gathering strength from its confined channel, which is only two hundred and eighty yards wide, rushes over the fall to the depth of eighty-seven feet.
"After raging among the rocks, and losing itself in foam, it is compressed immediately into a bed of ninety-three yards in width: it continues for three hundred and forty poles to the entrance of a run or deep ravine, where there is a fall of three feet, which, added to the decline during that distance, makes the descent six feet.

As it goes on, the descent within the next two hundred and forty poles is only four feet; from this, passing a run or deep ravine, the descent in four hundred poles is thirteen feet; within two hundred and forty poles, another descent of eighteen feet; thence, in one hundred and sixty poles, a descent of six feet; after which, to the mouth of Portage Creek, a distance of two hundred and eighty poles, the descent is ten feet.