"Of the journey back I have but a dim and feverish recollection. I remember that my feet got worse instead of better, that when the wretched shoes were beyond even tying together with vines, I cast them away, and bandaged the feet with what remained of my shirt. That on the second and third day of our journey we had not even a little bird to eat, but plunged forward in a stupid apathy of hunger and pain.

That on the fourth morning one of the men espied a gorilla, who came roaring toward us, beating his vast chest, and waddling up to the attack with such horrid utterances and soul-freezing aspect, eyes glaring, and the monstrous face distorted with impotent rage, that for once, waking out of my dreamy stupor, and seeing this image of the devil coming upon us, I would have run if my feet had borne me." -- Paul Du Chaillu, "Explorations and Adventures in Equatorial Africa" (1861)