During our voyage from San Fernando to San Carlos on the Rio Negro, and from there to the town of Angostura, I made the effort to note down in writing, every day, whether in the canoe or at night camps, anything that happened which was worthy of note. The heavy rain and incredible amount of mosquitoes crowding the air on the Orinoco and Casiquiare obviously left gaps in my chronicle, but I always wrote it up a few days later. The following pages are taken from this journal. What is noted down while actually viewing the described objects keeps a semblance of truth (dare I say 'individuality'), which gives charm even to insignificant things.