Historical clue formulations

• Not at all hidden — 2015-01-21
• Lacking subtlety — 2008-05-28
• Not subtle at all — 2007-08-15
• Hardly hidden — 2006-06-01
• Sans subtlety — 2006-01-13
• Barefaced — 2004-06-25
• Barefaced — 2001-11-04