Complex sentence: During the English Civil War the Rectory's occupant, Dr Hugh Lloyd, was captured on the battlefield at the nearby Battle of St Fagans of 1648 and, after he was released at the end of the war, became Bishop of Llandaff.
Split into simpler sentences: During the English Civil War the Rectory's occupant, Dr Hugh Lloyd, was captured on the battlefield at the nearby Battle of St Fagans of 1648. After he was released at the end of the war, became Bishop of Llandaff.