As we approached La Laguna the air cooled. This sensation delighted us as we found the air in Santa Cruz asphyxiating. As we tend to feel disagreeable sensations more strongly, we felt the change in temperature more as we returned from La Laguna to the port, as if we were approaching the mouth of a furnace.

We dared to cross the last half of the Atures raudal in our boat. We landed every now and then on rocks, which act as dykes, forming islands. Sometimes water crashes over them, sometimes it falls into them with a deafening noise. It was here that we saw one of the most extraordinary scenes. The river rolled its waters over our heads, like the sea crashing against reefs, but in the entrance to a cavern we could stay dry as the large sheet of water formed an arch over the rocks. We had the chance to view this bizarre sight for longer than we wished. Our canoe should have passed around a narrow island on the eastern bank and picked us up after a long detour. We waited for several hours as night and a furious Storm approached. Rain poured down. We began to fear that our fragile boat had smashed against some rocks and that the Indians, as indifferent as ever to the distress of others, had gone off to the mission. There were only three of us, soaked to the skin and worrying about our pirogue, as well as thinking about spending the night in the Tropics, sleeping in the din of the cataracts. M. Bonpland proposed to leave me alone on the island with Don Nicolas Soto and swim the bit of the river between the granite dykes. He hoped to reach the jungle and seek help from Father Zea at Atures. We finally managed to dissuade him. He had no idea about the labyrinth of canals that split up the Orinoco or of the dangerous eddies. Then what happened under our noses as we were discussing this proved that the Indians had been wrong to say there were no crocodiles in the cataracts. We had placed our little monkeys on the tip of our island. Soaked by the rain, and sensitive to any fall in temperature, they began to howl, attracting two very old lead-grey crocodiles. Seeing them made me realize how dangerous our swim in this same raudal on our way up had been. After a long wait our Indians turned up just as the sun was setting.

The climate of Nueva Barcelona is not as hot as that of Cumanà, but it is humid and unhealthy during the rainy season. Bonpland had survived the crossing of the llanos and had recovered his strength to work as hard as before. I myself felt worse in Nueva Barcelona than I had in Angostura after our long river trip. One of those tropical downpours, with those enormous raindrops that fall far apart from each other, made me so ill I thought I had typhus. We spent a month in Nueva Barcelona, enjoying all the comforts of the town.

According to my careful trigonometric calculations the Duida mountain rises 2, meters above the Esmeralda plain, some 2, meters, more or less, above sea-level. I say more or less because I had the bad luck to break my barometer before our arrival in Esmeralda. The rain had been so heavy that we could not protect this instrument from the damp and, with the unequal expansion of the wood, the tubes snapped. This accident especially annoyed me as no barometer had ever lasted so long on such a journey. The granite summit of the Duida falls so steeply that Indians have not managed to climb it. Though the mountains are not as high as people think, it is the highest point of the chain that stretches from the Orinoco to the Amazon.

The last days of our crossing were not as peaceful as the mild climate and calm ocean had led us to hope. We were not disturbed by the dangers of the deep, but by the presence of a malignant fever that developed as we approached the West Indies. Between the overcrowded decks the heat was unbearable; the thermometer stayed at 36'C. Two sailors, several passengers and, strangely, two blacks from the Guinean coast and a mulatto child were attacked by an illness that threatened to turn into an epidemic. The symptoms were not as serious in all the sick; but some of them, even among the most robust, became delirious on the second day and lost all body strength. With that indifference which on passenger ships affects everything that is not to do with the ship's movements and speed, the captain did not for a moment think of applying the simplest remedies. He did not fumigate. A phlegmatic and ignorant Galician surgeon prescribed bleedings, attributing the fever to what he called the heat and corruption of blood. There was not an ounce of quinine on board and we, on boarding, had forgotten to bring a supply, more concerned for our instruments than for our health as we had not predicted that a Spanish ship would be without this Peruvian bark febrifuge.