The Stephen Sondheim Society Archive documents the life and work of musical theatre composer and lyricist Stephen Sondheim. The core of the collection was collected by antiquarian bookseller and Sondheim enthusiast Peter Wood- his collection later passed to the Society. Additional material has been added since, filling in gaps in the Peter Wood collection and documenting productions and publications that have occurred since it was transferred to the Society.

Both parts of the Collection contain a range of material on Stephen Sondheim and his work- notably programmes, leaflets, posters and press cuttings. There are also journals, books, audio visual material and collectables. The Collection dates from Sondheim's earliest work to the present and will continue to be added to as his works continue to be performed. There are also documents relating to the work of the Society itself, notably the Stephen Sondheim Society Student Performer of the Year awards (SSSSPOTY).

The David Heneker Archive contains the working papers of musical theatre composer David Heneker, who wrote or contributed to several well known musicals incluing 'Half a Sixpence' and 'Charlie Girl'. The Archive contains materials relating to each of the shows David Heneker worked on including drafts of songs and scripts, musicals scores, correspondence and publicity. There is also material relating to his work as a songwriter in the 1930s and 1940s (including the Second World War), and his work for films and advertising. There are also materials relating to shows and films that David Heneker worked on that never reached the final production stage.

Papers of Thomas Frederick Dunhill, comprising personal and business correspondence, 1912-1944 (mainly 1931-1940), including correspondence relating to performances of the comic opera Tantivy Towers by Dunhill and Alan P Herbert; notebooks of lectures by Dunhill, including 'British music of today', lecture for the Royal Albert Institute 11 Mar 1913, 'Sir Hubert Parry' to the British Music Society 8 Mar 1922, and 'The importance of the British composers of the later 19th century' to the Society of Women Musicians, 7 Jul 1922; musical notebooks; lists of Dunhill's compositions; manuscripts of articles and talks by Dunhill, including 'The chamber music of Anton Dvorak', and `English comic opera'; correspondence with the BBC regarding talks by Dunhill, including a version of Dunhill's Tantivy Towers for broadcast, 1937, 1941, 1945; correspondence regarding finances of the Musicians' Benevolent Fund, 1937-1938; correspondence with B W Smith and F J Whitmarsh on their proposed operetta 'Something in the city', 1937-1939s; cuttings of articles by or on Dunhill, 1915-1938; programmes featuring Dunhill's music; obituaries, 1946.