In 1241, Henry sent Peter to gather support for a pending invasion of Poitou. He travelled to Hugh IV, Duke of Burgundy; Theobald I of Navarre; his brother Amadeus IV, Count of Savoy; and his brother-in-law Ramon Berenguer IV, Count of Provence. In February 1242, Peter was sent into Poitou to see what support existed there for Henry. He was nearly captured there, but managed to escape. He then travelled to Provence to negotiate the marriage of his niece Sanchia of Provence to Henry's brother Richard.
In 1241, Henry sent Peter to gather support for a pending invasion of Poitou. He travelled to Hugh IV, Duke of Burgundy; Theobald I of Navarre; his brother Amadeus IV, Count of Savoy; and his brother-in-law Ramon Berenguer IV, Count of Provence. In February 1242, Peter was sent into Poitou to see what support existed there for Henry. He was nearly captured there, but managed to escape. He then travelled to Provence to negotiate the marriage of ?his niece Sanchia of Provence to Henry's brother Richard.