Howard's career received a check in 1547 with the downfall of his half-nephew Henry Howard, Earl of Surrey. However the setback was temporary. He was an ally of John Dudley, 1st Duke of Northumberland, then Earl of Warwick, in his coup against the Protector Somerset in October 1549, and on 19 March 1551 received the manor of Effingham, Surrey, and other properties by way of reward. On 29 October 1552 Northumberland secured Howard's appointment as Lord Deputy and Governor of Calais, and in the same month he was sworn of the Privy Council. When the young King Edward VI died on 6 July 1553, Howard held Calais for Queen Mary I against the supporters of her rival, Lady Jane Grey.