Historical clue formulations

• Nanki-Poo's father, with "the" — 2018-02-25
• Gilbert and Sullivan operetta, with "The" — 2015-06-09
• Old Asian title — 2010-10-22
• Nanki-Poo's father — 2007-08-22
• "Princess Ida" follow-up operetta, with "The" — 2006-08-31
• Gilbert & Sullivan work, with "The" — 2003-12-01
• Where to hear "Tit-Willow," with "The" — 1999-09-08
• Gilbert and Sullivan emperor — 1999-03-02