MSS.16A comprises manuscript notebooks belonging to successive secretaries of the Association, (William Tallack and Edward Grubb) recording visits to prisons in England, Scotland, Ireland, Wales and overseas, 1895-1906; articles and published letters on penal reform by Thomas Barwick Lloyd-Baker, 1858-1881 and other miscellaneous items.
MSS.16B includes League minute books, 1927-1955; the League's inter-war international papers; Penal Reformer , quarterly periodical of the Howard League and National Council for the Abolition of Death Penalty 1934-1939; other publications of the National Council for the Abolition of the Death Penalty.
MSS.16C contains miscellaneous documents on juvenile delinquency, 1833-1966; the papers of the League's predecessor, Penal Reform League, annual reports, 1911, 1913 and leaflets; Papers from the Hardwicke Reformatory, 1854-86.
MSS.16D comprises legal correspondence which supplements MSS.16A-B
MSS.16E and MSS.16F have not been fully listed. They comprise of reports and year books published by the Central Howard Association Inc., 1901-1921 (incomplete) and the papers of Martin Wright, 1970s, topics include Floud Committee, control units, Centre for Crime Problems, children and young persons and Howard League press-statements, 1972-7.