Historical clue formulations

• River of northern France — 2019-06-05
• Seine tributary — 2018-08-16
• French river or department — 2018-02-04
• River to the Seine — 2016-09-02
• Department in Picardy — 2016-03-05
• Chantilly's department — 2015-06-19
• Seine tributary — 2015-06-07
• River to the Seine — 2014-11-11
• Van Gogh's "L'Église d'Auvers-sur- ___" — 2014-08-01
• Beauvais's department — 2014-07-25
• French river — 2013-09-23
• Seine tributary — 2012-11-25
• Department north of Paris — 2012-11-18
• River to the Seine — 2011-10-04
• Seine tributary — 2011-05-23
• Auvers-sur-___, last home of Vincent van Gogh — 2010-05-13
• Chantilly's department — 2009-06-24
• Seine tributary — 2008-01-27
• River to the Seine — 2007-02-20
• River to the Seine — 2006-07-31
• Department that is home to the Parc Astérix amusement park — 2006-04-09
• Seine feeder — 2005-11-09
• Seine tributary — 2005-11-04
• Seine feeder — 2005-05-17
• Chantilly's department — 2004-11-28
• Seine feeder — 2004-07-29
• River to the Seine — 2004-06-13
• Seine tributary — 2003-09-30
• Tributary of the Seine — 2003-01-12
• Seine tributary — 2002-11-26
• It rises in the Ardennes — 2002-10-25
• Seine tributary — 2001-12-09
• Chantilly's department — 2001-07-20
• Seine feeder — 2001-07-15
• Seine feeder — 2001-02-27
• Seine tributary — 2001-01-28
• Seine tributary — 2000-09-19
• Seine feeder — 1999-08-16
• River to the Seine — 1999-05-05
• Department north of Paris — 1999-05-02
• Seine feeder — 1999-03-14
• River to the Seine — 1998-12-14
• Seine tributary — 1998-08-12
• River near Chantilly — 1998-02-01
• Seine feeder — 1997-10-10
• Seine feeder — 1997-04-23
• Department north of Paris — 1996-11-07
• River of France — 1996-08-11
• Compiegne's river — 1996-07-28
• Seine tributary — 1996-07-14