This opinion won't cost you a dime. The person who carved the symbols may be the only one who ever knew what their meaning was. And here's more -- maybe the symbols have no real meaning other than as a joke to addle the minds of treasure hunters. While we're on that subject, why do you feel these symbols lead to treasure in the first place? There's some prominent Indian-looking petroglyphs, a modern train carving below and your symbols (which look to me like they came last) on the panel you've displayed. Why does this add up to treasure? There must be more to the story than this photograph.