Historical clue formulations

• Remains in a hearth — 2023-05-28
• Smoldering remains — 2018-08-06
• Ones dying in a fire? — 2014-05-28
• Poker targets? — 2013-12-25
• Campfire remnants — 2013-04-22
• Fireplace remains — 2009-07-08
• Glowing remnants of a fire — 2007-10-09
• They may flare up — 2002-06-16
• Marshmallow roasters — 1997-06-07
• Ashes-to-be — 1994-12-11
• Barbecue leftovers — 1994-05-19