Historical clue formulations

• Cut again — 2009-09-24
• Further shorten, maybe — 2006-10-22
• Cut again — 2005-06-27
• Cut again — 2004-02-03
• Further shorten — 2002-04-10
• Further shorten, maybe — 2002-02-27
• Lumbering machine — 1998-05-09
• Further shorten, as a board — 1996-12-08
• Spotted again — 1996-02-19