Historical clue formulations

• Hotheadedness? — 2016-06-05
• Pyrexia — 2014-01-05
• Flu symptom — 2013-09-17
• What a thermometer may measure — 2012-07-01
• Flu symptom — 2011-10-11
• Flu symptom — 2011-06-28
• It might be run in a hospital — 2010-11-18
• Intense excitement — 2010-07-10
• It's not good to run one — 2010-05-11
• Peggy Lee's signature song — 2009-12-06
• Bad thing to run — 2009-09-18
• Pyrexia — 2009-02-07
• Head warmer? — 2004-10-31
• Flu symptom — 2002-02-19
• Kind of pitch — 1999-09-11
• Excitement — 1996-08-10