Related Clues:

• Archeological find
• Handwriting on the wall, maybe
• Ancient graffiti
• Some early paintings
• Archaeology discovery
• Prehistoric discovery
• Works on walls?
• Grotte de Cussac attraction
• Prehistoric paintings
• Some early doodles
• Primitive paintings, e.g
• The Lascaux bulls, e.g
• Writing on the wall?