J. Lloyd Williams's copies of published collections of folk songs, including New Song Book : Llyfr Canu Newydd, for Schools and General Use, Part 1: Score, (1929); J. Lloyd Williams and L. D. Jones (Llew Tegid), Alawon Gwerin Cymru : Welsh Folk Songs Arranged for Schools, vol. III, (1924); and Lady Herbert Lewis, Second Collection of Welsh Folk-Songs, (1934); together with various single items.
A melody in manuscript form, [?mid-19 cent.], entitled 'Marchnad Penmorfa neu Groesaw'r Wenynen', with annotations; cyclostyled copies of hymns by E. Thomas, Benllech, and Sissie Hughes; and a song by Robert Bryan.
A card index compiled by J. Lloyd Williams, listing the titles of hymn tunes, including sol-fa notation and sometimes the words of hymns. This sequence is followed by an index to journals relating to Welsh music and collections of early Welsh poetry, together with cards noting historical landmarks, 178-949 AD.
Notes and quotations from various sources relating mainly to folk songs and melodies. They include items relating to J. Lloyd Williams's proposed publication of folk songs for schools.
Miscellaneous papers, including notes by A. G. Gilchrist on songs which appeared in the third volume of the Journal; and a few songs and tunes from various manuscript and printed sources, mainly in J. Lloyd Williams's hand.
Correspondence, 1912-1934, relating to performances and a second publication of the work. A balance sheet relating to performances at Ruthin in 1938 is also included.
A volume of autographs, greetings and verses, 1901-1920, presented to J. Lloyd Williams by members of Bangor University Welsh Company ('Cwmni Cymreig Coleg y Brifysgol, Bangor') in recognition of the pleasure and experience which they had received during performances of Aelwyd Angharad and Cadifor, 1901-1902. Four photographs, apparently relating to performances of Aelwyd Angharad, are also included.
Papers relating to J. Lloyd Williams's proposed publication on the history of Welsh music and his published work entitled Y Tri Thelynor; together with papers reflecting his role as lecturer, broadcaster, adjudicator and editor.
Broadsheets advertising lectures and concerts on Welsh music, 1891-1927, including a series to be held at the University College of North Wales, Bangor, Session 1926-1927.
Preparatory notes for lectures and addresses on congregational singing, including material relating specifically to the Gymanfa Ganu and to the conducting of congregational singing. A few notes relating to conducting in general are also included.