The duke of Dorset's reappointment to the lord-lieutenancy in 1751, with his son Lord George Sackville as secretary of state for Ireland, strengthened the primate's position and enabled him to triumph over the popular party on the constitutional question as to the right of the Irish House of Commons to dispose of surplus Irish revenue, which the government maintained was the property of the Crown.
He had for some time lost the real direction of affairs, and in May 1699 he was compelled to retire from office and from the lord-lieutenancy of Yorkshire.
To the now nominal lieutenancy of Scotland.
In 1860, with the Cavour party, he opposed the work of Garibaldi, Crispi and Bertani at Naples, and became secretary of Luigi Carlo Farini during the latter's lieutenancy, but in 1865 assumed contemporaneously the editorship of the Perseveranza of Milan and the chair of Latin literature at Florence.
The success of his mission was complete; and on his return a few weeks afterwards he received the lord-lieutenancy of Ireland - a place he had long coveted.