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Papers, 1868-1941, collected by the solicitors in the course of their work, mainly documents relating to the business of Wyndham Hewitt Limited of The Causeway, Staines and 9 Clement's Lane, Lombard Street, City of London; including letters patent and other documents relating to inventions for improvements in generating machines and extractor fans by Henry F. Joel; and business agreements between Wyndham Hewitt and other businesses including Lagonda Motors Limited.

Papers of Bernard Albert Hunn, 1949-[1982], relating to his career and research, including: copy of Hunn's degree certificate from King's College London, 1949; notes on elliptic functions, 1950; correspondence, 1951-1953, relating chiefly to the publication of scientific papers on aeronautics; reports from Hawker Aircraft Ltd design department, 1951-1953; technical papers and notes by Hunn, 1952-1956, relating to aeronautical mathematics; draft monograph by Hunn on 'Inertial guidance', 1964; correspondence, chiefly with James Allason, MP, concerning the British defence industry and world markets, 1964-1965; patent applications for 'improved guiding means for spinning missiles', 1959 and for a 'mind simulator' (an electronic model of the human mind), 1982, with essays and notes on the function of the human mind; photographs of a interlock relay system and of Revenue Systems component parts for a card payment system to be attached to a petrol pump; and memoir concerning Hunn's work in Nigeria, 1974-1978.

Papers of Airwork Limited relating to Heston Aerodrome, comprising two annotated copies of a plan entitled 'Heston Aerodrome: Survey of land to be purchased by Airwork Ltd. April 5th 1935' and two annotated Ordnance Survey maps of the area.