Images such as the ghost served as maps or markers. In order to confuse the Spanish or anybody else trying to recover the treasure, Drake used several types of reversals when preparing his maps and markers. Misinterpretation of the reversals could be serious or fatal.

The least problematic result of not understanding the reversals was the wasted time and effort of digging in the wrong direction. The more serious outcome could result in injury or even death if the treasure hunter found himself digging in a location that could trigger a deadly trick such as a falling boulder or collapsing room!

Layer upon layer of beautiful, but highly toxic colored clays were used to fill the Treasure Cavern.

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This required many layers of protective clothing to prevent toxic metal poisoning.