Historical clue formulations

• Goes over again — 2024-05-16
• Studies more closely, perhaps — 2020-12-19
• Proofs, say — 2009-11-20
• Double-checks — 2007-06-27
• Peruses anew — 2001-10-15
• Peruses again — 1999-06-06
• Enjoys a favorite book — 1997-09-21
• Proofs — 1994-08-14
• Starts back at page one — 1994-04-10