Complex sentence: In the ensuing fracas Guiscard was fatally wounded, most likely by by James Butler, 2nd Duke of Ormonde, and died just over a week a later in Newgate Prison.
Split into simpler sentences: In the ensuing fracas Guiscard was fatally wounded, most likely by by James Butler, 2nd Duke of Ormonde. He died just over a week a later in Newgate Prison.