The Pearl of Lima by Jules Verne

Any other than the Indian, Martin Paz, would have, indeed, perished in the waters of the Rimac; to escape death, his surprising strength, his insurmountable will, and especially his sublime coolness, one of the privileges of the free hordes of the _pampas_ of the New World, had all been found necessary.

Martin knew that his pursuers would concentrate their efforts to seize him below the bridge; it seemed impossible for him to overcome the current, and that the Indian must be carried down; but by vigorous strokes he succeeded in stemming the torrent; he dived repeatedly, and finding the under-currents less strong, at last ventured to land, and concealed himself behind a thicket of mangrove-trees.