Historical clue formulations

• Coin in the Potterverse — 2019-09-29
• Bronze coin in the Harry Potter books — 2019-02-26
• Danish king who conquered England — 2015-08-16
• Unit of currency in the Harry Potter books — 2013-09-04
• Currency unit in Harry Potter tales — 2004-07-16
• Old Danish king who conquered England — 2004-06-20