This collection consists of the records of the main Fellowship of Reconciliation, England, supplemented with the records of the London Union of the FoR, the Ilford and Hornchurch branch, and the papers of Stella St John relating to her imprisonment as a consequence of her pacifist position during World War Two. The records of the main Fellowship of Reconciliation, England cover the period 1915-1962 and consist almost entirely of the minute books of the various committees and sub-groups of the organisation. Also included are albums of press cuttings and other ephemera relating to F T Haddon Bradley's conscientious objection in 1917. The records of the London Union cover the period 1916-1978 and consist of correspondence, minutes of various meetings including the annual meeting, accounts, campaign papers, policy papers, conference papers, press cuttings and reports of the London Union.

Papers of social scientist and progressive activist, Peter Hunot, 1939-1971, including: minutes, agendas, administrative correspondence and reports of the Central Board of Conscientious Objection, 1942-1945; pamphlets, leaflets and broadsheets published by the Central Board of Conscientious Objection, and general pamphlets relating to conscientious objection, 1940-1971; photographs of ARP (Air Raid Precaution) and NFS (National Fire Service) staff, committee meetings, bomb damage and the ARP at work, 1939-1945; papers, reports, statements, minutes and correspondence from Hunot's involvement with the National ARP Co-ordinating Committee and the ARP and NFS Review, 1940-1944; pamphlets, periodicals and publications regarding civil defence and ARP duty in Britain and America, 1942-1945.

Papers, including personal and professional correspondence; a heavily annotated copy of A.J.Ayer's 'Thinking and Meaning'; proof copy of J.E.McTaggart's 'Philosophical Studies'; Keeling's work on time and other reviews and articles; reviews of Keeling's own works; draft and proof articles for 'Encyclopaedia Britannica' and related correspondence; Keeling's birth and death certificates and documents relating to his will; 2 letters from Bertrand Russell (photocopies); a photocopy of details of Keeling's imprisonment as a conscientious objector in the First World War.

Papers, c1914-1989, of Dame Kathleen Lonsdale.

Biographical material includes correspondence and papers relating to imprisonment in Holloway Prison, with Lonsdale's own accounts of her time there; diaries and personal notebooks, 1946-1969; letters of congratulation on election as Fellow of the Royal Society (1945); various photographs dating from school to her later years.

Papers relating to Lonsdale's teaching and administrative work at University College London include papers on teaching undergraduate and postgraduate courses; significant documentation relating to laboratory personnel, research funding and general university administration; papers relating to the 'Round Table on Peace Studies', which proposed the establishment of a centre for research into international conflict at the University.

Research material, 1924-1970, consists of Royal Institution papers comprising notebooks, one dating from Lonsdale's first period there (1923-1927), correspondence with colleagues such as W H Bragg and J M Robertson, and Lonsdale's notes and drafts for various research topics; correspondence and papers from her University College years covering many different areas of research, including diffuse scattering of X-rays, thermal vibrations in crystals, methonium compounds and urinary calculi (the latter topic particularly well documented and including several case studies), and including a large group of photographs, mostly of X-ray diffraction patterns.

Papers on the preparation of volumes of the International Tables for crystal structure determination from Lonsdale's chairmanship of the Commission on Tables (1948) comprise drafts, notes and correspondence with colleagues and publishers.

Extensive papers relating to publications, lectures and broadcasts include drafts of articles, on subjects including peace and religious issues, also including obituaries and biographical articles on various individuals, books, book reviews, obituaries, and letters to newspapers and magazines, the latter principally on the issue of atomic weapons; general correspondence concerning publications; drafts of lectures, 1945-1970, including ethics and the role of science in society; a large series of lecture notes, 1933-1970; scripts for broadcasts, on topics ranging from crystallography to religion, 1945-1967.

Papers on foreign and domestic travel, 1943-1971, relating to conferences and lectures, on crystallography, science ethics, and work for the Society of Friends, including her visit to China (1955) and her world tour (1965).

Papers relating to organisations, notably the British Association for the Advancement of Science (BAAS) and the International Union of Crystallography (IUCr), including material relating to a number of International Congresses of Crystallography, also papers relating to participation in Pugwash Conferences on World Affairs, 1958-1970, and papers concerning prison reform and the running of Bullwood Hall Borstal, Essex.

Correspondence, 1927-1974, comprises two main sequences, one arranged alphabetically, the other chronologically; 'day files', principally carbons of outgoing correspondence, 1966-1969; a sequence of references and recommendations; also including correspondence relating to Lonsdale's period of imprisonment (1943). Correspondents include scientists such as Max Born, W H Bragg, W L Bragg, E G Cox, Dorothy Hodgkin, Judith Milledge, L C Pauling and A J C Wilson.