Historical clue formulations

• Library section — 2023-01-01
• Shelving area in a library — 2022-12-28
• Library area — 2022-01-18
• Groups of poker chips, typically — 2017-05-08
• Some IHOP orders — 2015-07-31
• Library area — 2014-08-19
• Library area — 2011-09-11
• IHOP servings — 2010-06-30
• Library section — 2009-11-22
• Library area — 2005-08-17
• Library area — 2005-05-19