Historical clue formulations

• "The Pied Piper of Hamelin" river — 2013-02-06
• River to the North Sea — 2010-10-30
• River formed by the junction of the Fulda and Werra — 2008-02-23
• River to the North Sea — 2006-09-14
• River into which the Fulda flows — 2003-09-28
• With 10-Down, region of Lower Saxony — 2001-03-10
• North Sea feeder — 1996-08-25
• Bremen's river — 1996-05-28
• Bremen's river — 1995-12-22
• North Sea feeder — 1995-02-12
• North Sea feeder — 1994-10-20