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Papers, 1940-1985, of Wilfrid Bennett Lewis, largely relating to his work on radar during World War Two and including copy of nominal roll of Air Ministry Research Establishment, Worth Matravers, 1940, giving staff details; copies of Telecommunications Research Establishment (TRE) Lists (organization charts), 1941-1944; photocopy of TRE nominal roll, May 1942, giving staff details; photograph of TRE personnel, Nov 1945; two photographs of 'Empire Scientific Conference Visit to TRE', 4 Jul 1946; correspondence between R Van de Hulst and W B Lewis and synopsis of thesis on radar history by Van de Hulst, 1981. Printed material, including scientific papers and newsletters, is largely by authors other than Lewis and comprises offprints, 1946, of W B Lewis, 'Fluctuations in Streams of Thermal Radiation' (from Proceedings of the Physical Society, vol lix, 1947) and 'Radar Receivers' (from Journal of the Institution of Electrical Engineers, vol 93, pt IIIA, no 1, 1946); TRE Memorandum L/M50/WBL: W B Lewis, 'Ultimate limits of Infrared Technique'; Physics Department (TRE) newsletters, 1950, 1952-1953, 1956-1957, 1960-1961, with publications 1957-1960; A M Uttley, The Computation of Pattern Differences', Nov 1952, TRE Gt Malvern; TRE Technical Notes nos 70, 76, 86, 91, 108-109, 114, 120-1, on topics including radar; TRE Report T 2131: W Culshaw, 'The Michelson Interferometer at Millimetre Wavelengths'; TRE Memorandum, Ref RAS/48/7: R A Smith, 'Note on the relative advantages of various types of Rectifier'; part of TRE Technical note no 52, 'Thin film resistors of the noble metals'; publications from the Physics Department, Royal Radar Establishment (RRE) Malvern, 1947-1956; RRE newsletters and research reviews, 1962, 1964-1971; Royal Signals and Radar Establishment newsletters and research reviews, 1980-1982, 1985.

Proof copy of article on his military career, 1915-1944, notably concerning his experiments with the transmission and interception of wireless messages and radar, [1962].

This series consists of a collection of reports on trials and demonstrations of various systems, applications and agreements for the establishment of stations, permits to conduct experiments, departmental and Parliamentary reports and miscellaneous correspondence on the subject, including references to the establishment of an Imperial Wireless Chain.

Significant items in this series include a collection of original letters to Sir William Preece, the Post Office Engineer-in-Chief and electrician, from Guglielmo Marconi dating from the latter's arrival in the United Kingdom, and which describe a number of experiments in wireless telegraphy.

Papers of Sir Ambrose Fleming, including extensive sets of laboratory notebooks which include accounts of experiments on carbon filaments carried out by Fleming when he was adviser to the Edison and Swan Electric Light Company, of tests on electrical and photometric standards carried out in the Pender Laboratory at University College London, and of experiments on valves and other aspects of wireless telegraphy; notes of lectures attended by Fleming and notes for lectures given by Fleming; patent specifications and papers on litigation over them; newspaper cuttings and other compilations by Fleming; papers on awards and distinctions; biographical notes; and correspondence. 500 of the 521 volumes are printed works associated with the collection.

Papers, 1915-1971, of Capt George Harold Lever relating to his service as a wireless operator. Papers, 1915-[1956] and undated, relating to the campaign in German South West Africa in 1914-1915 include notes on the campaign which cover a period at Kuruman Mission Station, journey with the Advance Eastern Force Kalahari Desert to Keetmanshoop, joining the column to Karibib and Tsumeb, and accounts of life on the marsh, the Boer natives, and meeting General (Louis) Botha. Photographs of South Africa, 1915, include Kuruman, the desert, and General Botha. Three photographs portray Lever in London, 1915, and Chelmsford, 1919. Papers on the British Military Mission to Southern Russia, 1919-1920, comprise Lever's diary, covering his service as Wireless Telegraphy Officer and including photographs; and glass lantern slides, largely reproduced in the diary. Papers, 1918-1971, on Lever's service and postings between 1914 and 1922 include reports and correspondence.

Records of the Globe Telegraph and Trust Company Limited, with records of predecessor and subsidiary organisations as listed below. The records include: minutes and papers presented at meetings, annual reports, constitutional documents, deeds, reports, financial records, administrative files, staff magazines and histories. Deeds which survive from 1717 pre-date the establishment of the business.

Predecessor/subsidiary companies with records in this collection:
Globe Telegraph and Trust Co Ltd;
Aberdeen, Ceylon and Eastern Trust Ltd;
Aberdeen, Edinburgh and London Trust Ltd;
African Direct Telegraph Co Ltd;
Associated Cable Companies;
British Australian Telegraph Co Ltd;
British Indian Extension Telegraph Co Ltd;
British Indian Submarine Telegraph Co Ltd;
Cable and Wireless (Holding) Ltd;
Cable and Wireless Ltd;
Cables Investment Trust Ltd;
China Submarine Telegraph Co Ltd;
Companhia Telegrafica Platino Brasileira;
Connaught Trust Ltd;
Deutsche See Telegraphen Gesellschaft;
Direct Spanish Telegraph Co Ltd;
Eastern and South African Telegraph Co Ltd;
Eastern Extension, Australasia and China Telegraph Co Ltd;
Eastern Telegraph Co Ltd;
Electra House Ltd;
Europe and Azores Telegraph Co Ltd;
Falmouth, Gibraltar and Malta Telegraph Co Ltd;
Great Western Telegraph Co Ltd;
Marseilles, Algiers and Malta Telegraph Co Ltd;
Mediterranean Extension Telegraph Co Ltd;
Pacific and European Telegraph Co Ltd;
River Plate Telegraph Co Ltd;
Share Investment Trust;
Victoria Embankment Properties Ltd;
West African Telegraph Co Ltd.

Records relating to a proposed Photographic Department of Imperial College, 1949-1981; photographic services, including reports, 1980-1988; Television Studio and Live-net, 1986-1994.