The Most Remarkable Of These Dikes, Or Natural Dams, Are Purimarimi, Manimi, And The Leap Of The Sardine (Salto De La Sardina). I Name Them In The Order In Which I Saw Them In Succession From South To North.

The last of these three stages is near nine feet high, and forms by its breadth a magnificent cascade.

I must here repeat, however, that the turbulent shock of the precipitated and broken waters depends not so much on the absolute height of each step or dike, as upon the multitude of counter-currents, the grouping of the islands and shoals, that lie at the foot of the raudalitos or partial cascades, and the contraction of the channels, which often do not leave a free navigable passage of twenty or thirty feet. The eastern part of the cataract of Maypures is much more dangerous than the western; and therefore the Indian pilots prefer the left bank of the river to conduct the boats down or up. Unfortunately, in the season of low waters, this bank remains partly dry, and recourse must be had to the process of portage; that is, the boats are obliged to be dragged on cylinders, or round logs.

To command a comprehensive view of these stupendous scenes, the spectator must be stationed on the little mountain of Manimi, a granitic ridge, which rises from the savannah, north of the church of the mission, and is itself only a continuation of the ridges of which the raudalito of Manimi is composed.

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