Historical clue formulations

• This puzzle has 78 of them — 2023-04-19
• Fills (in) — 2021-10-24
• Things detectives look for — 2021-04-27
• Parts of a crossword that the constructor works on last — 2020-09-09
• This and others — 2020-05-31
• 72 things in this puzzle — 2020-03-26
• Fingerprints, maybe — 2019-03-01
• "Jeopardy!" boardful — 2017-05-25
• Tip-offs — 2015-02-21
• Things hidden in treasure hunts — 2014-06-23
• Detectives' helpers — 2013-09-03
• Nancy Drew findings — 2013-06-19
• Things pieced together — 2010-08-27
• This puzzle has 78 — 2010-07-27
• 30-Across may provide them — 2005-08-20
• This puzzle has 78 — 1998-06-02
• Hints — 1997-07-27