There are some other stones in the area. All of them are on standard meridians or lines of latitude ~ by the mid 1700s Oklahoma had numerous well surveyed Spanish towns ~ abandoned at some point ~ haven't figured that part out ~ but the Indians who moved in from Montana retained the surveys, so they knew something. Take a good look at Helena MT ~ it's laid out according to the Spanish Law of the Indies that governed new town layouts. That area was occupied by nothing but Indians for all anybody knows. Check out the Comanche Indians for some interesting stuff ~ more like Europeans than Indians ~ related to all the other major tribes in OK before we shipped in Indians from the Eastern USA