Henry VI's "advisor"

Well, this explains a lot! From: The tales of Beedle the Bard, Notes to Babbitty Rabbitty and Her Cackling Stump by Prof. Albus Dumbledore: ...however, some magical historians have suggested that Beedle modeled Babbitty on the famous French sorceress Lisette de Lapin, who was convicted of witchcraft in Paris in 1422. To the astonishment of her Muggle guards, who were later tried for helping the witch escape, Lisette vanished from her prison cell the night before she was due to be executed. Although it has never been proven that Lisette was an Animagus* who managed to squeeze through the bars of her cell window, a large white rabbit was subsequently seen crossing the English Channel in a cauldron with a sail fitted to it, and a similar rabbit later became a trusted advisor at the court of King Henry VI.1 1 This may have contributed to that Muggle King's reputation for mental instability. *A wizard/witch able to transform into an animal while retaining their magical powers  DES Doug here: Can't find anything more about Lisette; does anyone know when those white stoats/weasels became fashionable?