Historical clue formulations

• Swamplike — 2023-10-22
• Like swampland — 2023-02-11
• Boglike — 2022-04-10
• Boglike — 2013-03-30
• Boglike — 2012-06-14
• Swampy — 2007-11-04
• Like a mudhole — 2006-02-03
• Like a bog — 2001-09-12
• Not solid — 1997-05-11
• Swamplike — 1997-02-20
• Swampish — 1995-08-05