"Beyond the completion of a 3,000-mile journey, mostly under amusing conditions, through a little-known part of the world, and the discovery of one new tributary to a tributary to a tributary of the Amazon, nothing of importance was achieved." Nothing indeed. In 1932, Peter Fleming, a literary editor, traded his pen for a pistol and took off as part of the celebrated search for missing English explorer Colonel P.H. Fawcett. With meager...