Historical clue formulations

• Professor 'iggins — 2021-11-10
• Professor 'iggins — 2021-07-11
• Professor 'iggins — 2019-08-21
• Professor Higgins, to Eliza — 2018-12-12
• Mr. 'iggins in "My Fair Lady" — 2018-04-18
• "Just you wait, ___ 'iggins ..." — 2013-03-19
• Professor 'iggins — 2011-06-24
• "Just you wait, ___ 'iggins ..." — 2010-11-11
• Eliza's mentor, to Eliza — 2010-04-03
• One of eight English kings, to a 45-Across — 2009-10-01
• Professor 'iggins — 2008-03-30
• Professor 'iggins — 2008-02-06
• Professor 'iggins — 2007-02-06
• Broadway's Prof. 'iggins — 2006-05-23
• Eliza's tutor, to Eliza — 2005-07-02
• Prof. 'iggins — 2003-12-07
• Professor 'iggins — 2002-11-27
• Professor Higgins, to Eliza — 1999-07-09
• "Just you wait, ___ 'iggins..." — 1999-04-03
• Liza's mentor, to Liza — 1997-08-29
• Professor 'iggins — 1997-06-24
• Professor 'iggins, to Eliza — 1997-06-13
• Mr. 'iggins — 1996-01-24