Historical clue formulations

• Disguised, briefly — 2017-01-31
• Sporting a fake nose and glasses, maybe — 2012-12-20
• Wearing a wig and shades, say — 2011-11-06
• Wearing a disguise, informally — 2011-09-14
• Under a false name, briefly — 2006-05-14
• Disguised, briefly — 2001-06-09