Amazon River Valley
Free to read here, from Project Gutenberg.
The Naturalist on the River Amazons
Exploration of the Valley of the Amazon, Part 1 (of 2)
Travels on the Amazon
A narrative of travels on the Amazon and Rio Negro,
Exploration of the Valley of the Amazon, Part 2 (of 2)
In the Amazon Jungle
The Black Phantom
The Inca Emerald
