[1] Annesley succeeded in the earldom in August 1838 on the death of his father.
[1] As this was a title in the Peerage of Ireland it did not entitle him to a seat in the House of Lords.
In 1867 he was elected an Irish representative peer, which he remained until his death.
Lord Annesley died at Cowes, Isle of Wight, in August 1874, aged 44.
He was unmarried and was succeeded in his titles by his younger brother, Hugh.