Historical clue formulations

• "De ___: A Life" (2014 biography) — 2015-07-04
• Actor Robert De ___ — 2012-08-07
• Robert De ___ — 2012-02-15
• Actor Robert De ___ — 2011-08-08
• De ___ (Nolte's "Cape Fear" co-star) — 2008-11-22
• Robert De ___ — 2006-09-28