The Spainiards, the pirates,and many other groups actually killed someone to bury with their treasure to guard it. So the only ones who actually knew where it was buried was the highest ranking person there. A small group was dispatches,usually in case of emergency, to bury a treasure to prevent it's capture by some other force. The only one that returned was the one in charge of burying it. The native American tribes used a different approach. If they captured a treasure, they buryied it and threatened to kill any in the group who told where it was buried. Usually only one knew of the exact location, and they usually were killed or replaced by someone else. In earlier times,it was not as hard for native Americans to overtake slow moving trains of burrows laden with gold and silver. It was also not hard for pirates to overtake ships heavy laden with gold,silver and precious gems. many treasure ships and treasure trains were ambushed and the treasure was taken elsewhere and deposited. During the civil war alone, many families were relieved of their gold and silver as well as their heirlooms,such as silver plate and silverware. Many mansions were looted and destroyed, and even entire towns wer destroyed. Most of these towns stached all their valuables together and were buried before they were invaded. Most of the residents were either killed or displaced, never to return.Most of the time those chosen to bury these were killed or driven away. It is estimated that more coins,gold,silver, jewelry and heirlooms are buried than is in existance today. Where it is, is anyones guess, as most were intentionally buried and lost, and of those most were given directions far away from the direction of the treasure. Happy Hunting. rockhound