Historical clue formulations

• [aria-label] Circled letter + walking stick — 2025-01-26
• Not widely known — 2024-03-28
• Mysterious — 2023-02-23
• Requiring rare knowledge — 2022-11-21
• Recherché — 2022-04-22
• Hard to understand — 2021-07-12
• Esoteric — 2020-11-30
• Recherché — 2020-10-10
• Esoteric — 2020-05-08
• Occult — 2019-07-13
• Understood by few — 2015-09-02
• Like much tax law — 2014-08-03
• Apprehended by a small group — 2014-07-11
• Impenetrable — 2013-02-15
• Like election laws, typically — 2012-08-19
• Esoteric — 2012-05-03
• Esoteric — 2010-03-08
• Esoteric — 2007-12-30
• Mysterious — 2004-01-18
• Like federal tax laws — 2003-02-26
• Like cult rituals — 2002-02-01
• Esoteric — 2002-01-08
• Recherché — 2000-10-14
• Cabalistic — 2000-05-14
• Like federal tax laws? — 2000-04-02
• Abstruse — 2000-03-25
• Esoteric — 1999-07-08
• Mysterious — 1999-04-07
• Like Federal tax laws — 1999-03-27
• Esoteric — 1998-03-30
• Secret — 1997-03-26
• +Secret — 1996-10-06
• Esoteric — 1995-10-01
• Esoteric — 1994-06-22