When the last heights of the Falklands had disappeared from the horizon, the _Nautilus_ sank to between twenty and twenty-five yards, and followed the American coast. Captain Nemo did not show himself. Until the 3rd of April we did not quit the shores of Patagonia, sometimes under the ocean, sometimes at the surface. The _Nautilus_ passed beyond the large estuary formed by the Plata, and was, on the 4th of April, fifty-six miles off Uraguay. Its direction was northwards, and followed the long windings of the coast of South America. We had then made 1,600 miles since our embarkation in the seas of Japan. About eleven o’clock in the morning the Tropic of Capricorn was crossed on the thirty-seventh meridian, and we passed Cape Frio standing out to sea. Captain Nemo, to Ned Land’s great displeasure, did not like the neighbourhood of the inhabited coasts of Brazil, for we went at a giddy speed. Not a fish, not a bird of the swiftest kind could follow us, and the natural curiosities of these seas escaped all observation. This speed was kept up for several days, and in the evening of the 9th of April we sighted the most easterly point of South America that forms Cape San Roque. But then the _Nautilus_ swerved again, and sought the lowest depth of a submarine valley which is between this Cape and Sierra Leone on the African coast. This valley bifurcates to the parallel of the Antilles, and terminates at the north by the enormous depression of 9,000 yards. In this place, the geological basin of the ocean forms, as far as the Lesser Antilles, a cliff of three and a half miles perpendicular in height, and, at the parallel of the Cape Verde Islands, another wall not less considerable, that encloses thus all the sunk continent of the Atlantic. The bottom of this immense valley is dotted with some mountains, that give to these submarine places a picturesque aspect. I speak, moreover, from the manuscript charts that were in the library of the _Nautilus_—charts evidently due to Captain Nemo’s hand, and made after his personal observations. For two days the desert and deep waters were visited by means of the inclined planes. The _Nautilus_ was furnished with long diagonal broadsides which carried it to all elevations. But on the 11th of April it rose suddenly, and land appeared at the mouth of the Amazon River, a vast estuary, the embouchure of which is so considerable that it freshens the sea-water for the distance of several leagues.