Historical clue formulations

• Sound like an old floorboard — 2021-01-05
• Sound from a floorboard — 2020-12-15
• Staircase sound — 2019-09-08
• Haunted house sound — 2017-08-27
• Audible sign of age — 2017-06-24
• What old knees may do — 2016-09-08
• Staircase sound — 2013-07-31
• Spooky sound — 2013-05-23
• Haunted house sound — 2013-03-17
• Haunted house sound — 2012-05-15
• Sound of an unsound floor — 2011-04-18
• Haunted house sound — 2005-06-07
• Haunted house sound — 2004-11-11
• Result of an oil shortage? — 2002-03-28
• It may come from a door — 1999-09-18
• Floorboard sound — 1997-09-21
• Haunted house noise — 1997-07-30
• Sound of old floorboards — 1997-04-16
• Haunted house sound — 1994-06-03