Historical clue formulations

• Furry animals with black-tipped tails — 2023-09-22
• Ermines, in the summer — 2019-04-14
• Brown weasels — 2013-11-17
• Animals with black-tipped tails — 2011-06-05
• Brown furs — 2009-05-10
• Animals with brown summer fur — 2008-06-16
• Not highly valued furs — 2005-01-06
• Brown ermines — 2002-11-28
• Not so valuable furs — 2001-03-01
• Summer ermines — 1998-11-01
• Brown furs — 1995-10-26