in his cell at Nuremberg, November 1945 When the
Second World War started, Gisevius joined the German intelligence service, the
Abwehr, which was headed by Admiral
Wilhelm Canaris, who was secretly an opponent of Hitler. Canaris had surrounded himself with
Wehrmacht officers opposed to Hitler and he welcomed Gisevius into this group, which counted among its members General
Ludwig Beck,
Abwehr Chief Canaris, and
Mayor Carl Goerdeler of
Leipzig. Several members of the conspiratorial circle against Hitler including Gisevius, "all kept homes within easy walking distance of each other." According to Gisevius, the original plot to kill Hitler earlier (namely, before the acquiescence of Great Britain over the Sudetenland) was utterly derailed by Neville Chamberlain whose actions he claims "saved Hitler." Canaris arranged for appointment of Gisevius as
Vice Consul in
Switzerland and in late 1940 introduced him to
Halina Szymańska, who was working jointly for Polish intelligence and the British intelligence agency
MI6. Working from the
consulate in
Zürich, Hans Gisevius was also involved in
secret talks with the Vatican. Upon returning to Germany, he was investigated by the Gestapo, but released. In 1944, after the failed
20 July assassination attempt against Hitler, Gisevius first hid at the home of his future wife, the Swiss national Gerda Woog, and fled to
Switzerland in 1945, making him one of the few
conspirators to survive the war. There, he contacted the Swiss authorities. Peter Hoffmann's biography of Hitler assassination conspirator
Claus von Stauffenberg ("Stauffenberg, A Family History," 1992) indicates that after the failure of Stauffenberg's bomb plot in July 1944, Gisevius went into hiding until 23 January 1945, when he escaped to Switzerland by using a passport that had belonged to Carl Deichmann, a brother-in-law of German
Count Helmuth James von Moltke, who was a specialist in international law serving in the legal branch of the Foreign Countries Group of the
OKW (
Oberkommando der Wehrmacht, "Supreme Command of the Armed Forces"). Through the help of the American Allen Dulles in Berne, Switzerland and of the German Legation (in Berne)'s Georg Federer, the passport was modified and a visa obtained for Gisevius that enabled him to escape to Spain. ==Later life==