Historical clue formulations

• Silo fill — 2024-11-03
• Mill fill — 2019-10-04
• Rice or wheat — 2019-04-01
• Tiny amount — 2014-01-04
• Wood feature — 2012-11-10
• Means of identifying wood — 2009-11-08
• Scintilla — 2007-12-16
• Millet, for one — 2007-06-30
• Corn or oat — 2007-05-07
• Tiny amount — 2002-12-29
• 1980 embargo target — 2002-11-01
• Silo contents — 1997-07-30
• Woodworker's concern — 1994-07-05
• Rye or corn — 1993-11-30