This sentence was incorrect: "He also wrote "America Needs Indians" and "Raped Again!", the latter described as a blueprint for enslaving entire populations.[1] "
The first title, "America Needs Indians" is by Hicala Iktomi. This could conceivably be a pseudonym of Thayer, but I find no evidence of that.
As for the second title, it appears there is no book called "Raped Again!" The phrase is used in an ad in the back of Doubt a for a book called "Rape of the Masses" by Sergei Chakhotin http://files.afu.se/Downloads/Magazines/United%20States/Doubt%20(Fortean%20Society)/Doubt%20-%20No%2021.pdf https://en.wikipedia.org/wiki/Sergei_Chakhotin The book is clearly not by Thayer.
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