Of all body complaints those that persist without change are the worst; against them the only cure is patience. It is likely that the emanations of the Casiquiare jungle infected Bonpland with such a serious disease that he almost died when we reached Angostura. Luckily neither he nor I suspected this at the time. The view of the river and the hum of insects became monotonous; but our natural good temper did not snap, and helped us survive this long journey. We discovered that eating small bits of dry cacao ground without sugar and drinking a lot of river water appeased our hunger for several hours. Ants and mosquitoes annoyed us more than hunger and humidity.