Complex sentence: Having thwarted the Jacobite plot to murder the King in 1696, he helped to arrange the peace of Ryswick in 1697; in 1698 he was ambassador to Paris for six months.
Split into simpler sentences: Having thwarted the Jacobite plot to murder the King in 1696, he helped to arrange the peace of Ryswick in 1697. In 1698 he was ambassador to Paris for six months.