I must now speak of the cataract of this river, which is called by the Spaniards El Salto Grande, and occurs about the 24th deg. of lat. and 325th of long., near the ruined city of Guayra. I myself never saw it: I shall, therefore, describe this prodigy of nature in the words of Father Diego Ranconier, a Fleming, who gave a most accurate description of it in the name of the Jesuit Father Nicolas Duran, then Provincial of Paraguay, in his annals of Paraguay, dated Rome, in the year 1626. "Amongst all the things," says he, "capable of exciting admiration in these provinces, this cataract easily obtains the first place; and indeed I know not whether the whole terraqueous globe contains any thing more wonderful. The river precipitates itself, with the utmost violence, down an immensely high rock, twelve leagues in descent, and dashes, in its downward course, against huge rocks of horrible form, from which the waters, being reverberated, leap up to a great height, and as the channel is in many places intersected, on account of the exceeding roughness of the rocks, the waters are separated into various paths, and then meet together again, causing stupendous whirlpools. In other places also, the waters, leaping down, rush into the rocks themselves, and are concealed from the view: then, after having remained hidden for some time, again break forth, as if they had sprung from various fountains, and swallow up vast masses of rocks. Lastly, so great is the violence of the waters in the descent of the stream, that, during the whole course of twelve leagues, they are covered by a perpetual foam, which, reflecting the rays of the sun, dazzles the eyes of beholders with its brightness. Also the sound of the water, falling down and dashing against the rocks, may easily be heard at four leagues distance. This rough descent being ended, the water seems inclined to rest on the bottom, in smoother ground. For it often stagnates there by day, but almost every hour a loud noise arises, from some hidden cause, and the water leaps up to the height of many cubits. Fish of immense size are seen there: and Father Antonio Ruiz de Montoya, then missionary of the Guarany nation, in Guayra, declares that he saw a fish, as big as an ox, swimming on the river, with only half his body above water. Nor is this incredible; for when I visited the Guarany Reductions," (he means the new colonies of Indians,) "they wrote me word that an Indian had been swallowed by a river-fish of this kind, and afterwards ejected whole on to the bank."