During the 1641 rebellion, he quite naturally sided with the Crown upon whom his title and lands depended. When the rebellion spread into Munster, he fought vigorously against the insurgents. On 10 May 1642, he stormed the Castle of Ballymacpatrick (now Careysville), near
Fermoy, which was held by his grand-aunt, and hanged forty of the rebel leaders before breakfast. On 16 May, he lost
Barrymore Castle at Castlelyons, his seat, to
Maurice Roche, Viscount Fermoy and
Donough MacCarty, 2nd Viscount Muskerry. He led a regiment at the
Battle of Liscarroll in September 1642. He died two weeks later on 29 September 1642 at his house in Castle Lyons probably of wounds received at the battle. He was buried in the Boyle Vault,
Youghal,
County Cork, by his grieving father-in-law, Richard Boyle. == Notes and references ==