In 1619 after the beginning of his father's long imprisonment in the
Fleet Prison in London, Thurles was summoned to England to answer charges of
treason, specifically, of having garrisoned
Kilkenny. However, on 15 December the ship conveying him was wrecked off
the Skerries, Isle of Anglesey, and he drowned. Like his father, Thurles was a prominent
Catholic and it seems likely that his refusal to conform to the established
Anglican religion had angered King
James I and may have been the true motive for his summons. Thurles predeceased his father, who would die in 1634. His eldest son James, the future 1st Duke of Ormond, became heir apparent and bearer of the courtesy title Viscount Thurles until he succeeded his grandfather as the 12th Earl of Ormond. Thurles's widow survived him for more than 50 years. == Notes and references ==