All you have ever gone by, including theory, in the desert, is your own findings while there?
That dismisses someone else's interpretation when creating the stone maps theorizing they are usable ,or should by your standard of nothing but feet on ground can comprehend relative theories. Yet have you tried to interpret the stone maps of some one else, or not? Was the original stones carver(s) in the mountains when the stones were carved? Someone understood the maps as they are not caused by natures hand so why not reach and say anyone not having been in the supes has no insight, is as accurate as saying any who have been in the supes and have not found the maps ends are a little more difficult to believe as they were there so what of the searching the mountains theory then? Too big, too tough or how many other ways to justify being empty handed? Or is it a problem of interpreting a map before wearing out boot leather?