A biography of Thomas Argyll Robertson (1909-94) who played a key role in Operation Mincemeat (the Second World War operation which suggested that an invasion of Greece was imminent) and masterminded the 1944 Operation Fortitude (which was designed to persuade the Germans that the invasion of France would take place not in Normandy but in Pas de Calais). This is one man’s fascinating story. It is also the story of the extraordinary contribution that Robertson and his colleagues in British counter-intelligence made through the XX or ‘Double Cross’ system. Thomas Argyll Robertson’s (‘TAR’) colourful personal story has never been told. Overlooked in numerous books and television documentaries this is an attempt to set the record straight.