Heinrich von Lützow has lunch with Sir Maurice De Bunsen, Britain’s ambassador to Vienna. Britain is close to Russia, Serbia’s patron. This does not stop Lützow discussing the plans he overheard when he met with Berchtold and the German ambassador. The retired foreign ministry official reveals to De Bunsen that a harsh ultimatum is being prepared for despatch to Belgrade. Lützow expresses his doubts that any war with Serbia can be prevented from escalating into a wider conflict.