Historical clue formulations

• Clear — 2026-09-04
• Clear — 2024-03-02
• Unmistakable — 2015-08-05
• Patent — 2006-08-19
• Not hard to understand — 2003-04-26
• Plain — 2002-08-16
• Palpable — 1999-07-02
• Clear — 1999-03-19
• Clear — 1998-09-19
• Manifest — 1995-07-28