 He became one of the sureties for Florence MacCarthy Reagh, who had been imprisoned since his surrender in 1600, and who dedicated to Thomond his work on the antiquity and history of Ireland.He died on 5 September 1624, at Clonmel, and was buried in Limerick Cathedral, where a monument with inscription was erected to his memory.Pollard concludes that he was one of the most influential and vigorous of the Irish loyalists; and, though his devotion and motives were sometimes suspected, Carew wrote that "his services hath proceeded out of a true nobleness of mind and from no great encouragement received" from the court.