Experimental notes, working papers, correspondence and lecture summaries compiled by Charles Wheatstone, 1836-1875, and photographs collected by him in that period. Notably including papers relating to the development and testing of the telegraph, [1836-1960]; descriptions of experiments and test results concerning the measurement of electromotive forces and electrical potential, [1840-1875]; experimental observations on the nature of magnetism, electricity and thermodynamics, including electromagnet design, batteries and dynamos, [1834-1855]; working papers relating to optics including experiments into refraction, colouration of compounds and polarisation, [1850-1875]; drafts of lectures on sound and musical instruments prepared by Wheatstone, [1832-1837]; material relating to the management of the Wheatstone collection of scientific instruments and library, 1890-1992; biographical material relating to the life of Wheatstone, the invention of the telegraph and Wheatstone's musical instrument manufacturing business, with unrelated newspapers, 1757-1975; stereoscopic photographs and glass negatives taken by Roger Fenton, Samuel Buckle, Jules Duboscq and others, featuring landscapes, still lifes, panoramic scenes of cities including Paris and Moscow and the interior and exterior of the Crystal Palace, Hyde Park, Sydenham, 1851, and especially the Exposition Universelle, Paris, 1855, [1850-1901]; artefacts from Department of Physics, King's College London, including demonstration equipment, telegraph apparatus, a nail fiddle and other prototype musical instruments, [1834-1875]; exhibition of scientific and musical instruments, [1834-1875].

Papers principally relating to operations of the Special Operations Executive (SOE) in Italy, Greece, the Aegean and the Balkans, 1941-1945, including: SOE training manuals, and various SOE memoranda relating to the 'Rhine mine', poisons, inland waterways, and the 'New Zionists', 1941-1944; memoranda and directives on SOE infiltration of Italy and the recruitment of Italian agents, the production of propaganda for use in Italy, transcripts of subversive propaganda broadcasts to the Italian people via Radio Jerusalem, letters from Stefano Terra, regarding the activities of the anti-fascist group Giustizia e Libertà, 1940-1943; diary of Capt R Guy Turrall during his SOE sabotage mission to Crete, 1941-1942; papers concerning SOE Operations BASILIC and ERRATIC (infiltration of Scarpanto and Rhodes), 1943; papers concerning propaganda operations in conjunction with the Political Warfare Executive, particularly Operations KREIPE and KRIMSCHILD, May 1944, to demoralize German troops on Crete; reports, 1943-1945, relating to SOE activities on Crete, including reports on the kidnapping by SOE of German Maj Gen Heinrich Kreipe; appreciations of SOE activities in Greece, Hungary, Bulgaria, Rumania, 1943; correspondence of Headquarters Force 133 (SOE Cairo, Egypt) in regard to promotion, welfare, training, transfers and postings of personnel, including confidential reports on individual staff, 1944-1945; diary of Maj John Mulgan, British Liaison Officer in Greece, 1944; correspondence relating to the winding up of SOE organisation in Greece, 1944-1945; various other papers, comprising correspondence with Anne René Pleven, 1939-1941, on the German bombing of London and the reaction of the French people to German occupation and the Vichy government; report on René Pleven, French Minister of Defence, concerning Pleven's attitude to the French political situation, policy towards Indo-China and the French High Command, 1949; papers relating to the reorganisation of Lyons Silks Ltd, French Silhouettes and Arnold Securities, 1949-1950; newspaper article on German penetration of the SOE network in the Netherlands, 1942-1944, dated 1953.

Copy of diary covering his service as ADC to Winston Churchill at the Cairo Peace Conference and including details of meetings with Col Thomas Edward Lawrence (later known as Thomas Edward Shaw), Mar 1921; photocopy of photograph of Coote, 1917; brief account of his life and career, 1893-1946, written by his godson, Air Cdre B H Newton in 1981.