From the various sources of "clues".
You can see Weaver's Needle to the south and Four Peaks to the north where Four Peaks looks like one peak.
Go to First Water, then to Second Water, then take the old Government trail to San Carlos. Where the trail turns south, you will see over the point of the ridge, you can look north and the Four Peaks are lined up to look like one peak. In the other direction you will see a high needle-pointed rock. In the canyon under you is the hidden camp. You can't get down there because it is too steep, but go to the mouth of the canyon and then back. You can find the rock house with very little difficulty. You won't be able to see it until you are right upon it. After finding the camp, come back out of the canyon. Across the canyon and up it is a side canyon. Go up this side canyon to a cave. Opposite the cave is a tunnel and the mine.
20) One needs to climb up about 40 feet to see Weavers Needle to the south. (Waltz)
If I find any other examples, I'll add them to this post later.