Historical clue formulations

• Melancholy — 2016-12-22
• What a rain cloud over a head may represent, in comics — 2016-11-29
• Atmosphere of many a Poe story — 2014-12-30
• Atmosphere of despondency — 2014-04-14
• Melancholy — 2013-08-27
• Shadows — 2013-02-16
• Depressing darkness — 2010-12-05
• Depression — 2008-07-20
• Despondency — 1997-10-14
• ____ and doom — 1995-08-02