In 1435 he was deployed by Lord Talbot in suppressing a popular revolt in Normandy. The Normans of the Pays de Caux, heartened by the death of the Duke of Bedford (Regent of France), rose up, robbed many towns under English control, and captured Harfleur by assault, and other towns. Lord Talbot sent for Lord Hoo, Lord Scales and Sir Thomas Kyriell, who visited severe reprisals on that country, slaying more than five thousand people, burning the unfortified towns and villages, rounding up all the livestock and driving the rebellious inhabitants into Brittany. In October 1435 Henry VI appointed Hoo to the office of Keeper of the Seals of France. Hoo became Chancellor of France in 1443 after the death of Louis de Luxembourg, Bishop of Thérouanne