Historical clue formulations

• Halley of Halley's comet — 2025-10-04
• Rostand who wrote about Cyrano — 2017-07-14
• Halley of Halley's comet — 2016-08-21
• ___ Dantès, the Count of Monte Cristo — 2016-08-11
• Astronomer Halley — 2013-09-29
• Hoyle of "Hoyle's Rules of Games" — 2013-01-08
• Controversial one-act play by Mamet — 2011-11-04
• Astronomer Halley — 2010-09-14
• Oscar winner O'Brien — 2005-08-10
• Actor O'Brien — 2003-09-29
• Dumas's Dantès — 2003-06-01
• Dumas's Dantès — 2002-06-28
• O'Brien of "The Barefoot Contessa" — 1997-05-08
• Oklahoma city — 1995-05-16
• Actor O'Brien — 1993-11-28