When King John died in October 1216, Isabella's first act was to arrange the speedy coronation of her nine-year-old son at the city of Gloucester on 28 October. As the royal crown had recently been lost in The Wash, along with the rest of King John's treasure, she supplied her own golden circlet to be used in lieu of a crown. The following July, less than a year after his crowning as King Henry III of England, she left him in the care of his regent, William Marshal, 1st Earl of Pembroke and returned to France to assume control of her inheritance of Angoulême.