I don't know if very many other people would look on a 4" cannon ball dating to the Indian wars as a treasure, but I would. A person with whom I have gotten acquainted found one on his ranch in western Nebraska. It was an interesting find in and of itself, but the way it was situated was even more interesting: It was atop a conical shaped mound of dirt in a bad lands area. It seemed to have served as a cap rock/stone which prevented the dirt immediately under it from eroding. (In the bad land areas, such conical shaped hills topped by a cap rock are common. The cap rock protects the underlying ground from erosion.) There it was, when my friend found it: a 4" cannon ball atop a conical shaped mound of dirt less than l' foot tall!
Obviously, the ball had been underground until erosion exposed it.
A number of things, arrow points, etc., have been found in the area--but I'm not at liberaty to say where.
