When a traveler recently arrived from Europe steps into South American jungle for the first time he sees nature in a completely unexpected guise. The objects that surround him only faintly bring to mind those descriptions by famous writers of the banks of the Mississippi, of Florida and of other temperate regions of the New World. With each step he feels not at the frontiers of the torrid zone but in its midst; not on one of the West Indian Islands but in a vast continent where everything is gigantic; mountains, rivers and the masses of plants. If he is able to feel the beauty of landscape, he will find it hard to analyse his many impressions. He does not know what shocks him more: whether the calm silence of the solitude, or the beauty of the diverse, contrasting objects, or that fullness and freshness of plant life in the Tropics. It could be said that the earth, overloaded with plants, does not have sufficient space to develop. Everywhere tree trunks are hidden behind a thick green carpet. If you carefully transplanted all the orchids, all the epiphytes that grow on one single American fig tree (Ficus gigantea) you would manage to cover an enormous amount of ground. The same lianas that trail along the ground climb up to the tree-tops, swinging from one tree to another 100 feet up in the air. As these parasitical plants form a real tangle, a botanist often confuses flowers, fruit and leaves belonging to different species.

Seated on the crater's external edge we turned our eyes towards the north-east where the coasts are decorated with villages and hamlets. At our feet masses of mist, continually tossed about by the winds, changed shape all the time. A uniform layer of cloud between us and the lower regions of the island had been pierced here and there by wind currents sent up from the heated earth. The Orotava bay, its vessels at anchor, the gardens and vineyards round the town, appeared in an opening that seemed to enlarge all the time. From these solitary I regions our eyes dived down to the inhabited world below; we enjoyed the striking contrasts between the peak's arid slopes, its steep sides covered with scoriae, its elevated plains devoid of vegetation, and the smiling spectacle of the cultivated land below. We saw how plants were distributed according to the decreasing temperatures of altitudes. Below the peak lichens begin to cover the scorious and polished lava; a violet (Viola cheiranthifolia) similar to the Viola decumbens climbs the volcano's slopes up to 1, toises above all other herbaceous plants. Tufts of flowering broom decorate the valleys hollowed out by the torrents and blocked by the effects of lateral eruptions. Below the retama lies the region of ferns, and then the arborescent heaths. Laurel, rhamnus and strawberry-tree woods grow between the scrub and the rising ground planted with vines and fruit trees. A rich green carpet extends from the plain of brooms and the zone of alpine plants to groups of date palms and banana trees whose feet are bathed by the ocean.

As the missionaries struggle to penetrate the jungles and gain the Indian land, so white colonists try, in their turn, to invade missionary land. In this long-drawn-out struggle the secular arm continually tends to take over those Indians tamed by the missions, and missionaries are replaced by priests. Whites and mestizos, favored by corregidores, have established themselves among the Indians. The missions are transformed into Spanish villages and the Indians soon forget even the memory of their own language. So civilization slowly works its way inland from the coast, sometimes hindered by human passions.

A journey to the Tenerife volcano's summit is not solely interesting for the amount of phenomena available for scientific research but far more for the picturesque beauties offered to those who keenly feel the splendors of nature. It is a hard task to describe these sensations for they work on us so much more powerfully the more they are vague. When a traveler must describe the highest peaks, the river cataracts, the tortuous Andes valleys, he risks tiring his readers with the monotonous expression of his admiration. It seems better suited to my intentions in this narrative of my journey to evoke the particular character of each zone. We get to know the features of each region better the more we indicate its varying characteristics by comparing it with others. This method enables us to discover the sources of the pleasures conferred by the great picture of nature.

We had been warned that we would find the insects at Esmeralda even more cruel and voracious' than in this branch of the Orinoco; despite this we looked forward to sleeping in an inhabited place, and botanizing a little at last. At our last camp on the Casiquiare we had quite a fright. I presume to describe something that might not greatly interest a reader, but should be part of a journal of incidents on a river in such wild country. We slept on the edge of the jungle. At midnight the Indians warned us that they had heard a jaguar growl very close to us; it seemed to be up a nearby tree. The jungle is so thick here that only animals who climb trees exist. As our fires gave off 'plenty of light, and as we had become hardened to fear, we did not worry too much about the jaguar's cries. The smell and barking of one of our dogs had attracted the jaguar. This dog, a large mastiff, had barked at the Start, but when the jaguar approached the dog howled and hid under our hammocks. Since the Apure we had been used to this alternating bravery and fear in a young, tame and affectionate dog. We had a terrible shock the next morning. When getting ready to leave, the Indians told us that our dog had disappeared'. There was no doubt that the jaguar had killed it. Perhaps when it no longer heard the roars it had wandered off along the shore, or perhaps we slept so deeply we never heard the dog's yelps. We were often told that on the Orinoco and the Magdalena old jaguars were so clever that they hunted their prey in the very camps, and twisted their victims' necks so that they could not shout. We waited a long while in case the dog was merely lost. Three days later we returned to the same place and again heard a jaguar roar. So the dog, which had been our companion from Caracas, and had often swum away from crocodiles, had ended up being devoured in the jungle.