Wartime Papers Notebook containing De Beer's training notes for the Lewis .303 machine gun, 1918. Records from De Beer's work during the Second World War (1939-1945), including the work of the Nature Observation (Army) Committee and De Beer's proposed Scientific Observation Scheme; and his later work on propaganda for the Psychological Warfare Division of SHAEF as a Lieutenant-Colonel. Consisting of example propaganda leaflets, and reports on post Operation Overlord planning and propaganda dissemination. 1918