Martin Bormann
Martin Bormann, who was serving as Hitler's private secretary, persuaded Hitler to allow a team of specially picked officers to record in shorthand his private conversations for posterity. The first notes were taken by the lawyer Heinrich Heim, starting from 5 July 1941 to mid-March 1942. Taking his place, Henry Picker took notes from 21 March 1942 until 2 August 1942, after which Heinrich Heim and Martin Bormann continued appending material off and on until 1944.