Col. Fawcett's memoir, compiled by his son (Exploration Fawcett, see below), aside from its terrific descriptions of Amazon & Andes environments, shows an odd mixture of racist & humane attitudes. He debunks a lot of the local myths about the native ["savage"] tribes, praises them, befriends them; yet he echoes some of the typical racialist/colonialist biases of time.
There's also the familiar spiritualist/mythological/speculative gumbo (Ignatius Donnelly-like) about Atlantis, lost worlds, etc. Certain theosophical/speculative themes seem to come as a mythological package, you often find them grouped together.
I want to read Eliz. Bishop's old Time-Life country study of Brazil now, & some other writings.
Heard her read at Brown many years ago (early 70s). We stood face-to-face very close for quite a while at the packed after-reading party. She was very short! Friendly, not a bit pretentious - though as usual I was at a loss for anything to say. (Partly, I think, because I had been a little disappointed in the reading. I should have studied up more beforehand. She recited in such a quiet monotone - had trouble following it.)