Historical clue formulations

• Protection: Var. — 2018-10-30
• Protection: Var. — 2018-06-08
• Sponsorship: Var. — 2014-10-29
• Breastplate of Athena — 2013-11-09
• Guidance — 2012-07-27
• Backing: Var. — 2011-04-24
• Sponsorship: Var. — 2010-06-06
• Protection: Var. — 2010-04-21
• Protection: Var. — 2009-04-18
• Auspices: Var. — 2008-11-23
• Sponsorship: Var. — 2007-08-16
• Auspices: Var. — 2007-04-14
• Protection — 2007-01-06
• Sponsorship: Var. — 2006-08-17
• Sponsorship — 2006-05-26
• Sponsorship — 2006-01-07
• Sponsorship: Var. — 2002-07-18
• Patronage: Var. — 2002-03-13
• Authority: Var. — 2001-05-04
• Sponsorship — 1999-08-29
• Auspices: Var. — 1999-06-08
• Protection: Var. — 1999-03-13
• Protection: Var. — 1998-11-11
• Auspices — 1998-10-30
• Protection: Var. — 1997-10-07
• Protection: Var. — 1997-09-11
• Sponsorship — 1997-07-13
• Sponsorship — 1997-06-01
• Auspices — 1996-05-11
• Athena's shield — 1995-08-02
• Auspices: Var. — 1994-11-15
• Guardianship — 1994-10-05
• Sponsorship — 1993-12-27
• Sponsorship — 1993-12-17