Llawysgrifau cerddorol yn tarddu o blas Llanofer, [1830x1871], yn cynnwys yn bennaf alawon gwerin, rhai gyda geiriau. Cofnodwyd rhai yn llaw Augusta Hall, Arglwyddes Llanofer (ff. 8-13), ac yn eu plith ceir alawon a gyhoeddwyd yng nghyfrol Maria Jane Williams, Ancient and National Airs of Gwent and Morganwg (Llandovery, 1844). = Music manuscripts originating from Llanover, [1830x1871], containing mainly folk tunes, some with words. Some are in the hand of Augusta Hall, Lady Llanover (ff. 8-13), and include tunes which were published in Maria Jane Williams, Ancient and National Airs of Gwent and Morganwg (Llandovery, 1844).
Nodir geiriau'r gân 'Agoriad y wawr' (f. 12 verso) yn llaw Thomas Price ('Carnhuanawc'). = The words of 'Agoriad y wawr' (f. 12 verso) are in the hand of Thomas Price ('Carnhuanawc').

Manuscript scores (without words) of arrangements of (mostly Welsh) folk songs for solo voice.

Ink full score (orchestral version, Welsh and English words); ink full score (piano version, Welsh and English words), marked in preparation for publication by OUP; and ink score (piano version, with Welsh words only).

Ink score for male voices.

A letter book, 1917-1922, of Philip Thomas, Neath, containing mostly copies of his replies to invitations to adjudicate at local eisteddfodau and to conduct cymanfaoedd canu, chiefly in South Wales. Included are five Welsh folk-songs mostly in tonic sol-fa notation (ff. 71-72, 74-76).

A volume containing transcripts in the hand of Philip Thomas of Welsh airs from Maria Jane Williams, Ancient National Airs of Gwent and Morganwg... (Llandovery, 1844) (pp. 1-64); John Parry, British Harmony... (Ruabon, 1781) (pp. 65-76); Edward Jones, The Bardic Museum (London, 1802) (pp. 77-80) and Musical and Poetical Relicks of the Welsh Bards (London, 1784) (pp. 81-3). A photostat copy of a letter, [c. 1844], from Maria Jane Williams, Aberpergwm, relating to the introduction to her book has been tipped in on p. 84.

Arrangements by Mansel Thomas of Welsh folk songs for male voices.

Manuscript scores of arrangements by Mansel Thomas of traditional Welsh folk songs for mixed voices.

Ink score of arrangements of 'Dacw 'nghariad i', 'Ym Mhontypridd mae nghariad' a 'Ffarwel i blwy' Llangower'.

Ink score, dated January 1982.

Miscellaneous letters, 1913-1934, mostly addressed to Philip Thomas, relating mainly to his involvement in local eisteddfodau and musical events. Included are letters and papers relating to Neath Harmonic Society, 1926 (ff. 34-36), and the 1933 Welsh Calvinistic Methodist Parliamentary Bill, 1931 (ff. 47-9); verses relating to the Mari Lwyd (f. 1); a printed programme of service for Central Church, Chicago, 1922 (ff. 11-13); Thomas's adjudication for the choral competition at the Swansea National Eisteddfod, 1926 (ff. 37-41); a printed leaflet for Haslemere Music Festival, 1934 (ff. 60-61); and the tune and words of a Welsh Christmas Carol (f. 53) and of a Welsh folk-song (ff. 64-66).

A collection, [c. 1869]-1936, by Philip Thomas, of miscellaneous hymns and folk-songs in Welsh, including hymn-tunes by Thomas Hopkin Evans, Liverpool (f. 3), John Hughes, Dolgellau (ff. 4-5) and John Nicholas, Port Talbot (ff. 7 verso-8); hymn-tunes from printed detholiadau (ff. 13, 15-28); and copies of tunes for inclusion in The Journal of the Welsh Folk-Song Society, 3 (1936). Also included are facsimile copies of pages from Robert ap Huw's music manuscript (BL Addl. MS 14907) (ff. 64-71).

Manuscript scores of orchestral arrangements by Mansel Thomas of Welsh folk songs.

Manuscript piano sketches ('before brass scoring') of 'Mini-variations on a Welsh theme', along with a set of orchestral parts. Based on the Welsh folk tune 'Hob y deri dando': Deheubarth-South Wales Version.

A copy of Jane Williams (Aberpergwm)'s Collection of Welsh Folk Songs, published in 1844, with an index by D. Emlyn Evans written on the cover.