To the astonishment of her Muggle guards, who were later tried for helping the witch to 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