Years ago, I was reading an article about banner stones, and it said the the mystery was solved, when an intact atlatl was found in a cave in Alabama, and it had a banner stone on it. I don't remember the publication, as it was quite some time ago. I have no other info on it. There were many theories on the stone, as being worn as a "Gorget", around the neck. The English, and French wore nice silver, and brass ones, and the Indians loved them, and they were included in trades, especially with chiefs during treaties.
Wayne