Historical clue formulations

• Milne's "Mr. ___ Passes By" — 2016-12-06
• Title "Mr." in a Milne play — 2015-02-07
• Milne's absent-minded "Mr." — 2011-02-01
• "Mr. ___ Passes By" (Milne play) — 2006-11-09
• A. A. Milne play "Mr. ___ Passes By" — 2001-07-29