John,
Give me a day or two & I'll dig up a few items re WGT'd travails. I think I have a photocopy of a 1909 letter either from him or about him, re his protesting his innocence in response to some accusation.
In 2000, I wrote an article about the Sacambaya treasure hunting, "Tales of Glitter or Dust" for AMERICAS, which you can find on line via various reprint serives. And as well a related piece, "Atahualpa's Ransom & Other Treasure Fables, for the Peruvian Times last year, here,
http://www.peruviantimes.com/26/atahualpas-ransom-other-trea... Dan