"Exploration of the Valley of the Amazon, Part 2 (of 2)" by Herndon and Gibbon is a two-volume expedition report published in 1854. In 1851, U.S. Navy lieutenants William Lewis Herndon and Lardner Gibbon split their expedition party to explore different routes through the vast, uncharted Amazon Valley. Their journey covered thousands of miles from Lima, Peru to Pará, Brazil, traversing wilderness from sea level to extreme elevations. Their detailed observations of this mysterious region captivated readers worldwide, prompting the government to print tens of thousands of copies. (This is an automatically generated summary.)