Historical clue formulations

• "Watch your back!" — 2026-04-26
• The "cave" of "cave canem" — 2014-03-19
• "Watch out!" — 2012-07-16
• "Watch out now" — 2011-02-15
• Start of a dog owner's sign — 2010-10-06
• Word of warning — 2009-03-05
• Start of a sign on a gate — 2008-07-06
• "___ the Ides of March" — 2002-02-25
• Meaning of "cave" — 1997-04-25
• Word of caution — 1996-05-29
• Word of caution — 1995-04-30