Interesting story which is related to a trip at the Haywood/Gonzales mine. I believe the text posted by Skyhawk, to be a Bark's side note of the story, developed as a more personal conversations between Jim and Tom, and Jim and Cuca via letter. The text seems to be edited ( as Jim stated ) but I believe only on the Hitler comparison, and not on the essence of the story.
Both Bark notes have very good clues about that mine, which are the route and the region close to the mine. For someone who is familiar with the Superstitions, is not too hard to recognize the route that Cuca has described in her conversations. Of course she didn't use detailed descriptions. little disorganized in some way, but used some very important clues which are the key if someone would want to do a research on his own.
To be more clear about the route, in the first clue when she described the place 1,5 mile E ( maybe a compass measurement or just a guess ) from WN, she described the place where Barks Canyon joins Needle Canyon at Bluff Spring Saddle. So, she indirectly wanted to say to follow Needle Canyon to the north. This, we can conclude from the second set of clues where she said " Go to Barkley's Ranch and then over the mountains to a little old brush corral " . This means Tom should go north, as the Barks Canyon is oriented, until see that small corral.
And here comes the most important clue which Tom should pass in regards to approach the corral, the " great falls " where someone has to crowl to the side because is too dangerous. And where is that great fall? nowhere than the steep bank on Dutchman's Trail, when you leave the plateau NW of the Bluff Spring Mountain, and you go down to reach LaBarge Canyon. There is the corral, which is also depicted in Stirrat Map posted above by Skyhawk. In 1913 were not established trails like they are now, and the most visitors in those mountains, followed the course of the canyons, as we can see also in Stirrat Map which was made later.
So, if they would follow LaBarge to the south, for sure they would not been able to see the corral in their way. After they went down the steep bank, they went stright down to LaBarge Canyon close to its rim, and passed across the small trench to the north, along the canyon's course. The corral is just there in the tall brush, few yards away to the north from that trench/small ravine.
" From there is not so far " but also not so close either. Someone has to find the three big rocks ( black as were given away following the text ) to the right of the trail , and from there about another half mile away. Don't complain, you have only a small teritorry to search.
In the past, Matthew Roberts posted some specimens from that mine, but I believe he found out the location by decoding with his friend the Salazar Survey.
