Historical clue formulations

• Hogwarts's "Half-Blood Prince" — 2025-07-27
• Head of Slytherin House in the Harry Potter books — 2025-05-18
• Professor in the Potterverse — 2023-08-05
• "Probably the bravest man I ever knew," per Harry Potter — 2023-06-17
• Potter's Potions professor — 2022-11-28
• Half-blood wizard of fiction — 2022-10-14
• Wizard's name in books and movies — 2022-07-10
• Harry Potter's potions professor — 2021-07-06
• Secret admirer of Lily Potter in the Harry Potter universe — 2020-08-28
• Hogwarts potions professor — 2019-09-29
• The half-blood prince in "Harry Potter and the Half-Blood Prince" — 2019-05-25
• See 83-Across — 2017-03-19
• Professor of potions at Hogwarts — 2015-10-26
• Hogwarts professor — 2015-07-09
• Dumbledore's killer — 2015-06-05
• Potter's potions professor — 2014-06-24
• He cast the Killing Curse on Dumbledore — 2013-11-15
• Hogwarts potions professor — 2011-03-16
• Potter's potions professor — 2010-12-21
• Potter's potions professor — 2010-07-27
• Potter professor Severus ___ — 2010-01-10
• Potions professor at Hogwarts — 2009-11-10
• Head of Hogwarts School's Slytherin House — 2009-01-17
• Hogwarts professor — 2007-09-23
• Potter's potions professor — 2005-03-02
• Harry Potter's potions professor — 2003-03-30