The Sonderfahndungsliste G.B. ("Special Search List Great Britain") was a secret list of prominent British residents to be arrested, produced in 1940 by the SS as part of the preparation for the proposed invasion of Britain. After the war, the list became known as The Black Book. The information was prepared by the Reich Security Main Office (RSHA) under Reinhard Heydrich. Later, SS-Oberführer Walter Schellenberg claimed in his memoirs that he had compiled the list, starting at the end of June 1940. It contained 2,820 names of people, including British nationals and European exiles, who were to be immediately arrested by SS Einsatzgruppen upon the invasion, occupation, and annexation of Great Britain to Nazi Germany. Abbreviations after each name indicated whether the individual was to be detained by RSHA Amt IV (the Gestapo) or Amt VI (Ausland-SD, Foreign Intelligence). The list was printed as a supplement or appendix to the secret Informationsheft G.B. handbook, which Schellenberg also claimed to have written. This handbook noted opportunities for looting, and named potentially dangerous anti-Nazi institutions including Masonic lodges, the Church of England and the Boy Scouts. On 17 September 1940, SS-Brigadeführer Dr Franz Six was designated to a position in London where he would implement the post-invasion arrests and actions against institutions, but on the same day, Hitler postponed the invasion indefinitely. In September 1945, at the end of the war, the list was discovered in Berlin. Reporting included the reactions of some of the people listed. Background The list was similar to earlier lists prepared by the SS, such as the Special Prosecution Book-Poland () prepared before the Second World War by members of the German fifth column in cooperation with German Intelligence, and used to target the 61,000 Polish people on this list during Operation Tannenberg and Intelligenzaktion in occupied Poland between 1939 and 1941. Rapid German victories led quickly to the Fall of France, and British forces had to be withdrawn during the Dunkirk evacuation, with the Nazi spearhead reaching the coast on 21 May 1940. It was only then that the prospect of invading Britain was raised with Hitler, and the German high command did not issue any orders for preparations until 2 July. Eventually, on 16 July, Hitler issued his Directive no. 16 ordering preparation for invasion, codenamed Operation Sea Lion. German intelligence set out to provide their invading forces with encyclopaedic handbooks giving useful information. Seven