6/1/2005
By Sharon Debartolo Carmack
Confused by cemetery symbols? Want to extract new evidence from your ancestors' grave markers? Follow these eight steps to uncover hidden clues during your next trip to the boneyard.
The jury's still out: Did Leonardo da Vinci really incorporate secret codes into his artwork? Scholars likely will debate that mystery for decades to come. Meanwhile, your own cryptographic riddles await you in your ancestors' burial grounds.