Historical clue formulations

• Black humor — 2023-06-25
• Shakespearean humor — 2023-03-16
• Bitter feeling — 2022-03-17
• Ill humor — 2021-07-12
• Vitriol — 2018-08-12
• Bad temper — 2018-01-09
• Ill humor — 2016-09-12
• Ill temper — 2014-09-08
• Nastiness — 2014-06-29
• Ill temper — 2013-07-30
• Vitriol — 2013-04-22
• Ancient humor — 2010-09-11
• Vitriol — 2008-01-09
• Peevishness — 2007-04-22
• Ill will — 2007-03-10
• Ill humor — 2007-01-14
• Choler — 2006-10-28
• Liver secretion — 2006-04-03
• Vitriol — 2005-12-07
• Peevishness — 2005-02-13
• Caustic comments — 2002-06-07
• Nastiness — 2002-02-09
• Nasty comments — 2001-07-11
• Digestion aid — 2001-01-26
• Ill humor — 2000-08-30
• Digestion aid — 1999-10-09
• Spleen — 1999-06-03
• Irascibility — 1998-01-15
• Digestive juice — 1997-07-17
• Venom — 1997-06-03
• Ill temper — 1997-02-27
• Ill temper — 1996-12-17
• Choler — 1996-05-09
• Gall — 1995-07-16
• Peevishness — 1995-07-15
• Ill temper — 1995-07-05