Collections of folk songs, carols and ballads, including those of members of the Canorion and Welsh Folk-Song Society, and eisteddfodic competitors. The collections of J. Lloyd Williams himself are also included, together with his transcripts of individual manuscripts compiled by others, and printed sources.
Material relating to the manuscripts of John Jenkins ('Ifor Ceri'), compiled by J. Lloyd Williams and including a list of some 258 tunes which Ifor Ceri sent to Bardd Alaw, 1820 and 1826; a catalogue of Ifor Ceri papers at the National Library of Wales; and an index comparing the location of tunes in the Ifor Ceri Manuscripts, The Welsh Harper and Alawon fy Ngwlad.
A number of hymn tunes, psalms and related notes and press cuttings, [1840], [1906x1930], mostly in J. Lloyd Williams's hand but also including notes by Mary Davies and a few related letters, 1918-1929, from others. Notes of a lecture entitled 'Caniadaeth y Cysegr', delivered at Aberystwyth in 1926, are also included, together with a reference to a folk song in the Ifor Ceri MSS.
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 of a lecture relating to the Welsh 'Hwyl', delivered at Denbigh, 1934; another recorded in Dr Walford Davies's musical 'At Home' programme; and a lecture entitled 'Pregethwyr a'u Lleisio', delivered at Bala, December 1922. Preparatory notes and other related papers include comments on the characteristics of contemporary Welsh preachers.
Lectures, outlines of lectures and miscellaneous notes relating mainly to the history of Welsh music, apparently delivered between 1919 and 1928; together with a synopsis of an address delivered at Denbigh Eisteddfod, [1939], and outlines of lectures for the Summer School at Denbigh, 1944.
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.
Adjudication notes and extracts from essays entitled 'Hanes Cerddorion a Cherddoriaeth Deheudir Cymru o 1700 hyd 1928', entered for competition at Llanelli Eisteddfod, 1930, and again at Aberafan/Port Talbot Eisteddfod, 1932; together with notes and extracts from another essay, entitled 'Hanes Cerddoriaeth Gogledd Cymru o'r Flwyddyn 1700 hyd ddiwedd 1928', entered at Caernarfon Eisteddfod, 1931. The adjudications were published in Y Cerddor, October 1930, November 1931 and January 1933.
The correspondents include John Griffith (1), E. J. Grutchfield (3), W. H. Hadow (2), Hughes & Son (6), John Hughes, Treorchy and Dolgellau (3), and D. A. Jones (2).