tell his colleagues, he is arrested as a deserter and delayed. He eventually gets word through to Macgillivray at Scotland Yard, but his enemy has two hours start and evades capture. Hannay is encouraged by a letter from Peter Pienaar, and at a meeting with Bullivant, Blenkiron and Mary, he pushes for them to hound the man down. They discuss the clues Hannay overheard on the beach, and Ivery's fear of the bombing, and Mary reveals that Ivery has proposed to her. Part Two Hannay returns to the war in Europe for several months. He finds Geordie Hamilton, and employs him as his batman; he runs into Launcelot Wake, working as a support labourer behind the lines; he sees several adverts in English and German newspapers, which he suspects may be some kind of coded communication. Hamilton reports having seen Gresson in a party of touring visitors, and Hannay learns he had stayed behind in a small village for a time; he later hears a story of mysterious goings-on at a chateau near the same village. Flying with Archie Roylance on a reconnoitre, they get lost in fog and land near the chateau in question, where Hannay sees a mysterious old woman in a gas mask. Finding the castle is in a vital strategic spot, he returns to investigate, and learns the place is leased by a man named Bommaerts, one of the words he had overheard on the beach in Skye. Sneaking into the house at night, he finds Mary there too, and learns she has seen Ivery, now calling himself Bommaerts, who is in love with her. They find anthrax powder and a newspaper with one of the adverts deciphered, and then Ivery arrives. Confronted by Hannay, he flees, and Hannay shoots after him; the chateau burns down. A few days later, in January 1918, Hannay is withdrawn from the front for more special duties. Blenkiron gives dinner for Hannay and Mary, now engaged, where he learns that the newspaper advert scam has been broken up and its operatives, led by Gresson, arrested. Blenkiron has found a second code in the messages, used by Ivery and his masters, and has identified Ivery as the Graf von Schwabing, a former high-flyer unseated by scandal. He hears of the Wild Birds, a ruthless and deadly band of German spies, of whom Ivery is a leading member, and learns that they