The city of New Valencia occupies a large area of ground, but its population is of some 6, to 7, souls. The roads are very wide, the market place (plaza mayor) is disproportionately large. As the houses are few the difference between the population and the land they occupy is greater even than at Caracas. Many of the whites of European stock, especially the poorest, leave their town houses and live for most of the year in their cotton and indigo plantations. They dare to work with their own hands, which, given the rigid prejudices in this country, would he a disgrace in the city. The industriousness of the inhabitants has greatly increased after freedom was granted to business in Puerto Cabello, now open as a major port (puerto mayor) to ships coming directly from Spain.

During the night we had left the Orinoco waters almost without realizing it. At sunrise we found ourselves in a new country, on the banks of a river whose name we had hardly heard mentioned, and which would lead us after a foot journey over Pimichín to the Río Negro on the Brazilian frontier. The father superior of the San Fernando mission said to us: 'First you must go up the Atabapo, then the Temi, and finally the Tuamini. If the black-water current is too strong to do this the guides will take you over flooded land through the jungle. In that deserted zone between the Orinoco and the Río Negro you will meet only two monks established there. In Javita you will find people to carry your canoe over land in four days to Caìo Pimichín. If the canoe is not wrecked go straight down the Río Negro to the fort of San Carlos, then go up the Casiquiare and in a month you will reach San Fernando along the Upper Orinoco. That was the plan drawn up for us, which we carried out, without danger, in thirty-three days. The bends are such in this labyrinth of rivers that without the map which I have drawn it would be impossible to picture the route we took. In the first part of this journey from east to west you find the famous bifurcations that have given rise to so many disputes, and whose location I was the first to establish through astronomic observations. One arm of the Orinoco, the Casiquiare (108) running north to south, pours into the Guainia or Río Negro, which in turn joins the Maraìon or Amazon.

We spent nearly two and a half hours crossing this plain, which is nothing but an immense sea of sand. Despite the altitude the thermometer indicated 13. in the evening, 3. higher than at noon. We suffered continuously from the pumice-stone dust. In the midst of this plain are tufts of broom, Spartium nubigenum. This beautiful shrub grows to a height of some 9 feet and is covered with aromatic flowers with which the goat hunters we met in our path decorated their hats. The dark, chestnut-coloured goats of the peak are supposed to be very tasty as they eat the leaves of this plant, and have run wild in these wastes from time immemorial.

A dreadful circumstance forced us to stay a whole month in Angostura. The first days after our arrival we felt tired and weak, but completely healthy. Bonpland began to study the few plants that he had managed to protect from the humidity while I was busy determining the longitude and latitude of the capital and observing the dip of the magnetic needle. All our work was interrupted. On almost the same day we were struck by an illness that took the form of a malignant typhus in my travelling companion. At that time the air in Angostura was quite healthy and, as the only servant we had brought from Cumana showed the same symptoms, our generous hosts were sure that we had caught the typhus germs somewhere in the damp Casiquiare jungles. As our mulatto servant had been far more exposed to the intense rains, his illness developed with alarming speed. He got so weak that after eight days we thought he was dead. However, he had only fainted, and he later recovered. I too was attacked by a violent fever; I was given a mixture of honey and quinine from the Caroni river (Cortex angosturae), a medicine recommended by the Capuchin monks. My fever continued to rise, but vanished the following day. Bonpland's fever was more serious, and for weeks we worried about his health. Luckily be was strong enough to look after himself; and took medicines that suited him better than the Caroni river quinine. The fever continued and, as is usual in the Tropics, developed into dysentery. During his illness Bonpland maintained his strength of character and that calmness which never left him even in the most trying circumstances. I was tortured by premonitions. It was I who had chosen to go up-river; the danger to my companion seemed to be the fatal consequence of my rash choice.

From the time we left Graciosa the sky remained so consistently hazy that despite the height of the mountains of Gran Canaria we did not make out the island until the evening of the 18th. It is the granary of the archipelago of the Fortunate Islands and, remarkably for an area outside the Tropics, there are two wheat harvests a year, one in February, the other in June. Gran Canaria has never been visited before by a geologist, yet it is worth observing because its mountains differ entirely from those of Lanzarote and Tenerife.