Townshend secured the dismissal of his rival, Lord Carteret, afterwards Earl Granville, but soon differences arose between himself and Walpole, and he had some difficulty in steering a course through the troubled sea of European politics. Although disliking him, George II retained him in office, but the predominance in the ministry passed gradually but surely from him to Walpole. Townshend could not brook this. So long, to use Walpole's witty remark, as the firm was Townshend and Walpole all went well with it, but when the positions were reversed jealousies arose between the partners. Serious differences of opinion concerning the policy to be adopted towards Austria and in foreign politics generally led to a final rupture in 1730. Failing, owing to Walpole's interference, in his efforts to procure the dismissal of a colleague and his replacement by a personal friend, Townshend retired on 15 May 1730. His departure removed the final obstacle to the conclusion of an Anglo-Austrian Alliance which would become the centrepiece of British foreign policy until 1756.