Historical clue formulations

• Mafia code of silence — 2024-05-21
• Secret code? — 2023-11-04
• Code you don't want to break — 2018-08-26
• Rule against singing — 2018-06-10
• Code broken by rats — 2017-08-03
• Code of silence — 2015-11-22
• Mario Puzo sequel — 2015-11-19
• Code broken by some singers — 2014-02-07
• Enforced silence — 2013-08-29
• Code that's dangerous to break — 2012-05-18
• Code of silence — 2011-12-22
• Italian code of silence — 2011-11-24
• Code of silence for 35-Down — 2011-03-22
• Sworn secrecy — 2011-02-13
• Mafioso's code of silence — 2010-08-18
• Mario Puzo best seller — 2010-05-19
• Code broken by Joe Valachi — 2010-05-01
• Mobster's code — 2009-08-19
• Mario Puzo sequel — 2009-05-03
• Gangster's code of silence — 2008-12-31
• "The Last Don" sequel — 2008-04-19
• Mafia code of silence — 2007-11-13
• Gag rule, of a sort — 2007-06-02
• Mario Puzo best seller — 2006-04-01
• Code of silence — 2003-12-20
• Sworn secrecy — 2003-07-04
• Mario Puzo best seller — 2001-02-18
• Mafia code of silence — 2001-01-18
• Mario Puzo best seller — 2000-09-03
• Mafioso's code of silence — 1998-01-26
• Code of silence — 1994-04-09