Intelligencer tells the extraordinary story of Australia's greatest spymaster, Walter Cawthorn. Trained as a teacher in Melbourne, he served at Gallipoli before joining the British Indian Army on the Western Front. From the Middle East to Vietnam, Cawthorn spied for four countries: Britain, India, Pakistan and Australia. In a career that took him from private soldier to Major General, Cawthorn created Pakistan's ruthless Inter-Services Intelligence bureau; was appointed twice as a High Commissioner; and spent eight years as Director of the Australian Secret Intelligence Service, (ASIS).