Historical clue formulations

• Some notes — 2014-11-08
• Short answers? — 2011-10-02
• Answers, for short — 2007-06-10
• Peruvian money — 2001-11-25
• Hundreds of centavos — 2001-02-16
• Answers, for short — 1998-01-07
• Musical notes — 1997-02-08