Part I: see https://www.gutenberg.org/ebooks/57756

Transcriber's note:

Text enclosed by underscores is in italics (_italics_).

33d CONGRESS,} HO. OF REPS. {EXECUTIVE, 1st Session.} { No. 53.

EXPLORATION OF THE VALLEY OF THE AMAZON,

MADE UNDER DIRECTION OF THE NAVY DEPARTMENT, BY WM. LEWIS HERNDON AND LARDNER GIBBON, LIEUTENANTS UNITED STATES NAVY.