Historical clue formulations

• Heinrich ___, "Die Lorelei" poet — 2018-03-18
• "Die Lorelei" poet — 2015-04-23
• Poet whose works were set to music by Schumann, Strauss and Brahms — 2010-04-15
• Poet whose last words were "Of course [God] will forgive me; that's his business" — 2008-09-21
• "Romanzero" poet — 2008-05-25
• Heinrich who wrote "Atta Troll" — 2008-01-06
• "Die Lorelei" poet — 2007-04-17
• Poet who wrote "Don't send a poet to London" — 2006-02-24
• "Die Lorelei" poet — 2005-03-22
• "Buch der Lieder" poet — 1998-12-19
• German poet Heinrich — 1997-01-26
• "Die Lorelei" poet — 1997-01-12
• "Die Lorelei" poet — 1995-12-31