 He fell ill in 1671 and died in June of that year.His last will, dated May 14 1671, contains evidence of his wide circle of gifted friends including Thomas Butler, 6th Earl of Ossory (whom he appointed his children's guardian), John Keating, the future Lord Chief Justice of Ireland, and the leading physician Nicholas Henshaw.He was buried, by his own direction, in a new vault in St. Mary's Church, Howth.