Two volumes of a manuscript diary, 1858-1859, recording the daily activities of James Patterson, a master at the Deaf and Dumb Institution, Manchester, run by his uncle. As well as the daily routine of teaching, Patterson describes his own studies at the School of Art, his interest in athletics and sports, communication with his family in Cornwall and a visit to London over Christmas 1858 (in which he walks about the city, visits the Colosseum, the Pantheon, the Crystal Palace at Sydenham and another establishment of that name at Great Portland Street, and witnesses some mesmeric experiments).

The bulk of the collection consists of correspondence: the Singers were clearly vigorous letter writers and both Charles and Dorothea had an enormous number of family, friends and acquaintances. Unfortunately many of their letters were hand written and very few carbon copies survive. Very occasionally an attempt at methodical selection and arrangement is evident: on the whole correspondence had been kept in alphabetical order, and this has been retained in the arrangement of the collection. Dorothea and Charles' correspondence was fairly mixed (reflecting their working life together) with the exception of two distinct groups: correspondence about Dorothea's research on alchemical manuscripts, and later correspondence about her hearing aids.

The main part of the collection centres on the correspondence; this has been grouped together in a self-evident sequence: writings and biographical personal papers follow. Certain of Dorothea's papers remained clearly distinct and these have been kept together. Section E contains a variety of material relating to Jewish refugees, which had been placed on one side by Dorothea after the war for permanent preservation. It has not been listed in detail but sorted into three broad categories. The last section, comprising additional correspondence of the Singers with Sir Zachary Cope, Sir Arthur Salusbury MacNalty and Dr F N L Poynter, is not strictly part of the collection, but these groups of correspondence were given to the Institute to be placed alongside the Singer papers.

Records of the Royal Association for Deaf People. The collection contains a wealth of information relating to the development of work with Deaf people over the 19th and 20th centuries in London and south-east England, including relief of the necessitous poor in the 19th century, the establishment of Deaf church communities from the 1880s and the early promotion of Sign Language as a recognised form of communication in the 1850s by Reverend Samuel Smith.

The records include:

Corporate records (LMA/4172/A) in relation to the Association's Trustee Committee, Standing Subcommittee, Executive Committee, Building Committee, Spiritual Subcommittee, Personnel Committee, Property and Personnel Sub-Committee, Finance and Fund Raising Committee, Public Relations Subcommittee, secretary's correspondence, annual reports, agreements, permanent year end papers, annual general meetings, Board of Trustees papers, and Essex Deaf Council.

Financial and Staff records (LMA/4172/B) consisting of accounts, legacies, salaries and expenses, and Staff meetings Minutes, and administration.

Records of Saint Faith's Home (LMA/4172/C) consisting of minutes of the Management Committee, accounts, and registration.

Branch and Mission Church records (LMA/4172/D) in relation to Croydon Branch, Saint Barnabus Church in Lerwisham, Saint Matthews Mission and Saint Paul's Hall in Walworth, Woolwich Deaf and Dumb Mission in Beresford Square, Saint Bedes in Lambeth, All Saints in Croydon, Saint Saviours Chapel on Oxford Street, Saint John of Beverely on Green Lane, All Saints in West Ham, and Saint Cedd in Romford.

Printed Material and photographs (LMA/4172/E) consisting of press cuttings, magazines and newsletters, events material and talks, photographs, posters/leaflets and advertising material, staff resources, and historical notes.

Audio-visual records (LMA/4172/F) consisting of videos and audio cassettes.

Electronic records (LMA/4172/G) consisting of documents saved on a CD.

Property records (LMA/4172/H) in relation to 120 Selhurst Road in Croydon, 26 Harold Road in Essex, and 4 The Drive in Middlesex.