Historical clue formulations

• Ghostly image — 2025-02-28
• Spooky specter — 2021-02-24
• Ghost — 2018-12-09
• Ghostly spirit — 2011-12-13
• Specter — 2010-08-17
• Spirit — 2009-04-24
• Spirit — 2004-07-18
• Phantasm — 2004-02-11
• Spirit — 2000-02-19
• Apparition — 1998-07-23
• Apparition — 1997-12-20