Papers of Maj Gen Ian Helstrip Baker, notably concerning armoured warfare, 1955-2003, including instructions, memoranda, reports and notes on training exercises including Exercise GAMEBIRD, Cyclops Sqn, 2 Royal Tank Regt, Libya, Jul 1964; Exercises OPEN GLOVE and TREBLE CHANCE, Cyclops Sqn, 2 Royal Tank Regt and 16 Parachute Bde Group, Sep 1964; Exercise DOUBLE STRETCH 72, 7 Armoured Bde, Germany, Feb-Mar 1972; Exercise RED RAT, 7 Armoured Bde, Germany, Sep-Oct 1972; MACLEOD, 7 Armoured Bde, Germany, Aug-Sep 1972; Exercise READY RAT, 7 Armoured Bde, Germany, 11 Sep 1972; Exercise LONG LOOK, for 7 Armoured Bde trials of ZB298 radar, Oct 1971-Apr 1972; organisational trial Exercise SQUARE RAT, Germany, 28 Dec 1972; Exercise FIRST STRETCH 73, 7 Armoured Bde, Germany, Feb 1973; Exercise DOUBLE STRETCH 73, 1 Armoured Bde, Germany, Mar-Apr 1973; Exercise HURST PARK 73, 7 Armoured Bde, Germany, Apr 1973; Exercise QUEEN'S PATROL, 7 Armoured Bde, Germany (relating to operations in Northern Ireland), May 1973; Exercise RED RAT 73, 7 Armoured Bde, Germany, Aug 1973; Exercise FOUR SQUARE, 7 Armoured Bde, Germany, Sep-Nov, 1973; photographs of [FV214 Conqueror battle tanks], Royal Armoured Corps, Bovington, Dorset and photograph of an amphibious jeep, partially submerged, 1960; photograph of Crown Prince Birendra of Nepal and others watching a Hornet Launcher vehicle being loaded with Malkara missiles by personnel of Cyclops Sqn, 2 Royal Tank Regt, Candahar Barracks, Tidworth, 15 Apr 1964; captioned photographs relating to Baker's visit to [1 Bn, Royal Green Jackets], Belfast, Northern Ireland, including: battalion personnel on patrol; Falls Road and Hamilton Street, Belfast, showing the aftermath of explosions; IRA weapons discovered, including rifles, knives, an RPG7 rocket launcher and RPG7 rockets, a car bomb and smaller incendiary devices, Aug 1972; photographs of Baker, Nov 1979 and in Brigadier's uniform; handing over briefing notes by Baker as Deputy Assistant Adjutant General, 17 Gurkha Div, Overseas Commonwealth Land Forces, 25 Jun 1962; training instructions for Cyclops Sqn, 2 Royal Tank Regt, Tidworth, Mar 1963-May 1964; briefing notes on the Parachute Sqn, Royal Armoured Corps, by Baker, 1964; Royal Armoured Corps training pamphlet, 'The technique of shooting from AFVs. Part 4: the application of fire from Saladin armoured cars' (MoD, Feb 1967); 1 Royal Tank Regt standing operational procedures, Jun 1969; briefing notes for Baker as Commander, 7 Armoured Bde, by Administration and Quartering staff, 7 Armoured Bde, 18 Jan 1972 and by Brigade Majors, 7 Armoured Bde, 7 Feb 1972; 7 Armoured Bde standing operating procedures relating to headquarters and operations (vol. 1), and administration and logistics (vol. 2), Feb 1972; training directives by Baker as Brigadier Commanding 7 Armoured Bde, Mar-Sep 1972; notes on the creation and history of the Desert Rat badge of 7 Armoured Bde, 1940-1972; training directive by Baker as Brigadier Commanding 7 Armoured Bde, Mar 1973; correspondence and accounts by Lt Col R A Pascoe, 1 Bn Royal Green Jackets, of the battalion's service in Belfast, 8-14 Oct 1972.

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].

Typescript memoir by Cadell, edited by his son Ian V Cadell in 1997, relating to his RAF career, 1925-1945, including details of the establishment of 80 Wing, RAF Countermeasures Unit, 1940, the establishment of the intelligence listening station, Chicksands, Bedfordshire, 1941-1943, and Cadell's role in the development of radar, 1939-1940.

Copies of papers relating to his life and career, 1938-1945, dated 1938-1944, 1971, comprising two flying log books, Jan 1938-Jun 1944; letter to Martin Middlebrook concerning Fernbank's RAF service during World War Two, with particular reference to his involvement in radar intelligence, written in 1971.

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.

Papers relating to his service in the RAF, [1939-1945], 1948, principally comprising official photographs of radar installations, [1939-1945] and RAF operations rooms, [1939-1945], including photograph of operations room of HQ Fighter Command, RAF Bentley Priory, Stanmore, Middlesex, 1939; typescript notes and diagrams about layout and organisation of RAF sector controloperations rooms, [1939-1945]; official photographs of [RAF station], Wunstorf, Germany, 1948.

Typescript unpublished memoir of Squadron Leader Harry 'Wacker' Pain, 1937-1978, including descriptions of: training as an Aircraft Apprentice, RAF Halton, 1937; wireless operator training in Wallace and Wapiti biplanes; airborne wireless operator training, RAF Driffield, 1939; working for Special Duties Flight, Coastal Command, as a gunner in long range Sunderland flying boats, 1939-1942, including survivor searches after submarine attacks, escorting convoys, account of destruction of flying boats Cabot and Caribou, Bodo, Norway, Apr 1940, training messenger pigeons, serious injury in crash and subsequent reposting as Signals Instructor, 1942, and retraining as an Air Traffic Control Officer, 1943. Also anecdotes from various postings including Nutts Corner, Northern Ireland, 1944-1946; opening a new Area Control Centre in Gibraltar, 1946; RAF Mingaladon, Burma, 1947, and RAF Negombo, Ceylon, 1948; Area Control Centre, RAF Watnall, UK, 1949; RAF Gutersloh, Germany, 1954-1957; Air Traffic Controller at RAF Coningsby, 1957-1959; assisting with the introduction of radar guided systems and the formation of Border Radar in RAF Bishops Court, County Down, Northern Ireland, 1959-1962 and RAF Boulmer, Alnwick, 1962-1964; RAF Paya Lebar, Singapore, 1964-1967; as controller, Northern Radar, RAF Lindholme, 1967-1970; RAF Patrington, Withernsea, 1970-1971; Senior Operations Officer, Border Radar, RAF Boulmer, 1971-1973.

Radar Calculation by Maurice Henry Lecorney Pryce. Introduction to the calculation states 'The problem is to find the electromagnetic field due to a source of elctromagnetic oscillations placed near to a very large sphere. By large is meant that the ratio of the wavelength to its radius, and also the ratio of the distance of the source from the surface of the sphere to its radius, are very small. The source is supposed to be in vacuo. The material of the sphere is such that waves are attenuated in a distance small compared with the radius."

Papers of Amory Hooper Waite, 1960-1984, chiefly comprising biographical material including details of Waite created for the occasion of Waite becoming a Fellow of the Radio Club of America, Sep 1976; press release on Waite receiving triple honours, 1 May 1980 and material provided by Waite for his own obituary including an autobiography, 1 Dec 1983; material from the 50th anniversary of the Byrd rescue mission, 1984; papers and history relating to radio ice depth measurements; copy of a paper by Noel Stone, entitled 'The Airborne Survey of Ice Caps at Radio Frequencies', Aug 1960 and copies of articles including 'An Empirical Determination of the Relative Dielectric Constant of the Greenland Ice Cap', by D C Pearce and J W Williams, in the Journal of Geophysical Research, Vol. 72, 15 Nov 1967; 'Airborne Radar Sounding of the Greenland Ice Cap: Flight 1', by A H Zanella, D C Pearce and J W Williams, in the Geographical Society of America Bulletin, Vol. 79, Nov 1968 and article on Waite, Jun 1984.

Papers of John Hugh Westcott relating to radar and adaptive control including report on CA [coastal artillery] no.1 and Mark IV radar equipment ('James'), with supplementary papers on control engineering at Imperial College, London, and some photographs.