For anyone interested in the story that is the most believable about Dr. Thorn, I would like to suggest that you find a copy of "John Spring's Arizona". Starting on page 278 and ending on page 287, Spring gives an account of Dr. Thorn's adventures in Arizona, as told to him by the good doctor himself.
Thorn was captured by Apache Indians under the leadership of Chief Pedro. After nearly "seven years" of living with the Apache, he was taken after a battle with the Navajo, who overcame his captors. The Navajo gave him leave to go where ever he wanted, and he made his way to Cuevero near Ft. Wingate.
While with the Apache, he had come across a wash of bare bedrock. "At this place there might have been perhaps $5000.00 in gold nuggets in sight." Dr. Thorn also said "I made several efforts to find the place where I saw the gold, and bankrupted myself on two different occasions in outfitting expeditions at Soccoro to find it."
This is the most credible story of the Doc Thorn story I have heard. Obviously there is more in the book, but this will give you an idea of how it all started.
The story was recorded in John Spring's diary on August 22, 1876. That was not done at some later date, but was recorded
as Dr. Thorn related his story to John Springer.
It's an interesting book and I would highly recommend it to anyone interested in the history of Arizona.

Good luck,
Joe Ribaudo