 He was returned M.P.for Oxford University in January 1624, and attended parliament closely until his departure in May as ambassador to Savoy and Venice, with special instructions to endeavour to gain the assistance of those states for the recovery of the palatinate.Towards the end of 1626 he was employed on a mission to Bern and Zurich on behalf of the Grisons; and in 1627 he endeavoured to mediate, at the king of Denmark's request, between that monarch and the Duke of Savoy.