Complex sentence: Hempel was later to try and negate the fear discovery of Kathleen had on the Irish Political establishment by underscoring German offers of military assistance should Britain invade the territory of Eire.
Split into simpler sentences: Hempel was later to try and negate the fear generated within the Irish Political establishment by the discovery of Kathleen. He was instructed to do this by underscoring German offers of military assistance should Britain invade the territory of Eire.