I found several errors in both Terry's & Hensons PA books.
both wrong Counties, & spelling errors. even personal names on occasion,
making research very hard. and making Skeptics think they are right
to be naysayers
Here is one of the false leads by Terry, this one is for Montana:
Storage Cave
no county listed
789
The natives called the mountain Nyankara and on it was a cave where the Native Americans stored gold they obtained from a mine which was close by. Not wanting the whiteman to get the stored gold they hid the cave by covering it over.
The question is, where is Nyankara? A search does show a mountain by this name, but it is in Africa!
Doubt they went that far LOL
Again. The majority , if not all Treasure stories are Based on a Truth.
People don't dream these things up 100%. not even Sci fi & horror Writers.
They all get their ideas from what they experience (hear, see) in life,
then re-interpret . they may hear the story in a saloon, over a Campfire,
Remember the names wrong if there are more then one involved
and Shuffle first & last names in the mix. (john Brown & George Blue could become John glu & George Brahn )Misspell names heard due to
strong accents. (Morgan, Morgane, Mogen,Norton) in some cases certain Towns. a treasure is buried in Franklin.
One person knows Tennessee... Must be there, another hears the town, Not the state.
but knows Franklin PA, immediately thinks there.
"Research"
Wyoming ......"Inyan-Kara" was Misspelled.
And the fact it is off Limits tells me the story is Believed by the Powers that Be.
Could this originally have been Montana Territory ? I didn't Read all.
Or could the cave Possibly be just over the Border into Montana ?
of course another thing to take into consideration.
Back when this would have happened, there was no pinpointing sites,
by saying take route 198 south 6 Mile From Jabip. and make a right. they would probably just say
south of "jabip."
so odds are if the closest mountain they could see was 10 mile away, or they started in Montana, headed towards
Inyan-Kara. found the cave and came Back & told the Tale in Montana
they still may have mentioned it as the location.

"Black Hills"
https://en.wikipedia.org/wiki/Inyan_Kara_Mountain