Historical clue formulations

• Extension — 2026-07-23
• Supplementary part — 2025-07-08
• Append — 2025-03-28
• Extra — 2024-09-08
• Extra — 2024-08-20
• Extension : Chrome :: ___ : Firefox — 2024-06-07
• New wing, say — 2024-03-06
• Bonus — 2024-01-29
• Bonus item — 2021-11-15
• Extra — 2019-10-19
• Supplemental item — 2019-08-12
• Extension — 2019-04-13
• Supplementary item — 2018-10-28
• Bonus — 2018-02-20
• Accessory — 2017-06-04
• Surcharge, e.g. — 2015-10-27
• Append — 2014-09-30
• Extension — 2013-12-22
• Software plug-in — 2013-10-18
• Build a new wing, say — 2013-05-20
• Supplement — 2012-11-15
• Enlargement — 2011-08-19
• Building wing, e.g. — 2010-10-05
• New wing — 2009-11-11
• Enlarge a house — 2008-01-01
• Write a codicil — 2007-03-04
• Wing — 2005-07-10
• Rider — 2005-05-28
• Building wing — 2004-06-09
• Attach — 2003-12-26
• Expand — 2002-01-03
• Accessory — 2001-07-19
• Annex — 2001-05-07
• Extension — 1999-11-18
• Rider, e.g. — 1999-06-18
• Extra — 1997-12-21
• Extra — 1997-03-05
• Enhancement — 1997-01-18
• Extra — 1996-10-13
• Attachment — 1996-10-11
• Supplement — 1996-08-09
• Append — 1996-07-01
• Attach — 1995-08-09
• Extend — 1994-11-20
• Suffix — 1994-11-01
• Architectural afterthought — 1994-04-01
• Attach an ell — 1994-03-23