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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.

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.