Ascending the Alta Paraná, another one hundred and twenty-five miles, one reaches the smoking cataracts of La Guayra. So scored are the river’s banks on either side by cascade and torrents that it might be called “waterfall land.” The Falls of La Guayra are another series of mighty cascades on the border between Paraguay and Brazil. Above the falls is a great lake all of the waters of which must pass over these precipices and through a narrow gorge. At one point it is only two hundred feet from cliff to cliff. The current piles up in the centre with a corkscrew motion which forms a maelstrom, with which the famous Whirlpool Rapids are a quiet pool. The total plunge of these falls is three hundred and ten feet. Above the La Guayra the Alta Paraná widens out and the hills retreat. At a distance of four hundred miles, or a total distance of one thousand six hundred and forty miles from Buenos Aires, are the Uberaponga Falls, another frantic water power awaiting the harnessing by man. One can follow this stream on up to its source in a flat, swampy section, which is also the source of one of the principal affluents of the Amazon. It drains a very large section of Brazil, for, because of the range of mountains which follows the coast line in Brazil, water falling within a few miles of the Atlantic turns its back on the blue waters of the ocean and journeys from fifteen hundred to two thousand miles before entering salt water by means of the La Plata. The route up the Uruguay River is much more picturesque than that up the Paraná. This majestic stream is about six miles wide at its junction with the latter river. It is somewhat less obstructed by islands here, so that both banks can usually be seen. And yet this great stream has moods, as well as other rivers. The current in its main channel will oftentimes change. It will encroach here and recede there, submerge an island in one place and form a new one in another. After a long drouth navigation must be conducted with caution, but the normal depth is generally sufficient for all purposes. During times of flood all kinds of strange small animals and vegetation are brought down by the Uruguay. The water is decidedly clay coloured. On one side is the flat Argentine plain, and on the other the undulating shores of Uruguay, for this river is the international boundary line between these two republics. Small topsail schooners may be seen coming down the river loaded with timber or fruit, and bound either for Montevideo or Buenos Aires. Farther up the stream contracts and one gets a more intimate acquaintance with the country. The banks shrink back and reveal a glimpse of flowering shrubs, willow trees, and an occasional palm. A stretch of bright, sandy beach may occasionally unfold itself. It is sometimes difficult to distinguish shore from island. Buoys mark the channel, which is very much zigzag. The sunsets on these broad waters and flat pampas are really wonderful. They paint the