Papers of the composer and musician Prof. David Evans, [1880 x 1948], comprising full and fragment scores of choral music, including orchestral and vocal scores, cantatas, anthems, hymn tunes, carols and other sacred music, arrangements of welsh airs, miscellaneous compositions, compositions by other composers, together with miscellaneous material.

Manuscript oratorios, operas, orchestral pieces, choruses, melodies and other musical compositions (including the four Welsh Airs arranged for choir and full orchestra premiered at the Crystal Palace, 1896); an autographed notebook containing solfa versions of Welsh melodies arranged for male voices, 1915; correspondence, 1934-1935, relating to the proposed publication of a memorial volume to Jenkins by nine of his contemporaries ('Er Cof am yr Athro David Jenkins Gan Naw o'i Gyfoedion'); music exercise books, 1877-1881, and a volume containing blacksmith's accounts, Trecastell, and particulars of payments to preachers, 1796-1810.

Llawysgrifau cerddorol, [1920x1950] David William Jones, yn cynnwys drafftiau o alawganau ac emynau, [?1920au-1940au]; ynghyd â cherddoriaeth gan gyfansoddwyr eraill, [1920au-1940au]. = Music manuscripts, [1920x1950], of David William Jones, comprising mainly drafts of cantatas and hymns, [?1920s-1940s]; together with music compositions by other composers, [1920s-1940s].

Papurau, 1838-[1991], yn bennaf papurau personol a theuluol Eunice Bryn Williams, 1838-[1991], yn cynnwys darnau cerddoriaeth yn llaw Eunice Bryn Williams, 1954-[1980au]; nodiadau darlithoedd ar gerddoriaeth, [1940au-1980au]; papurau'n ymwneud â Chymdeithas Alawon Gwerin Cymru a Chymdeithas Cerdd Dant Cymru, [1950au-1980au], ac eisteddfodau, yn arbennig Eisteddfod yr Urdd, [1930au-1980au]; rhaglenni cyngherddau o gerddoriaeth Cymreig, 1939-1961; a gohebiaeth deuluol,1888-1961. = Papers, 1838-[1991], mainly personal and family papers of Eunice Bryn Williams, 1838-[1991], including music pieces in the handwriting of Eunice Bryn Williams, 1954-[1980s]; lecture notes on music, [1940s-1980s]; papers relating to Cymdeithas Alawon Gwerin Cymru and Cymdeithas Cerdd Dant Cymru, [1950s-1980s], and to eisteddfodau, especially Eisteddfod yr Urdd, [1930s-1980s]; concert programmes of Welsh music, 1939-1961; and family correspondence, 1888-1961.

Llawysgrifau Evan James a James James, cerddoriaeth a barddoniaeth yn bennaf, 1806-1917, yn cynnwys fersiwn gwreiddiol yr alaw 'Glan Rhondda', y daethpwyd i'w hadnabod yn ddiweddarach fel Hen Wlad fy Nhadau, 1856; barddoniaeth Ieuan ab Iago,1831-1842; dyddiaduron,1806-1827, barddoniaeth, 1837-1849; cyfriflyfrau poced,1836-1837; a beirniadaethau eisteddfodol, 1853-1863. = Manuscripts of Evan James and James James, mainly music and poetry , 1831-1917, including the original version of the tune 'Glan Rhondda', which later became known as Hen Wlad fy Nhadau, 1856; poetry of Ieuan ab Iago, 1831-1842; diaries, 1806-1827, poetry, 1837-1849; pocket account books, 1836-1837; and Eisteddfod adjudications, 1853-1863.

Holograph manuscript music for Welsh and English vocal works, [?1950s]-1964; songs, 1918-[?1963]; orchestral works, 1939-[c. 1943]; works for wind and strings, [1930s]-1962; works for strings, including quartets, [?1920s]-[?1946]; pianoforte quintets, quartets and trios, [1920s]-1944; works for violin and pianoforte, 1920-1949; and miscellaneous works, [c. 1920]-1958.

Notebook, music book; anthems, hymn-tunes and marches; miscellaneous songs (solos and four parts); miscellaneous music; published compositions and scrapbook of Evan Morgan ('Alaw Tydfil'), Merthyr Tydfil, mainly containing copies of hymn-tunes by various composers.

The music manuscripts, 1927-1986, of Mansel Thomas, comprising music for male voice choirs, mixed choirs, youth and female voices, solo songs, and instrumental compositions. They consist mainly of Christmas music, hymn-tunes, liturgical music, arrangements of Welsh traditional melodies, secular music and solo songs, the majority of which have been published by the Mansel Thomas Trust and the Cwmni Cyhoeddi Gwynn Publishing Company. Some manuscripts are in the hand of copyists and may contain later notes and additions.

Manuscripts, mainly [19 cent., second ½]-1933, of the work of Welsh composers, mostly autograph, comprising holographs, copies and drafts of scores and sets of orchestral parts and also lyrics, including works by John Thomas (Pencerdd Gwalia), Dr Joseph Parry, David Jenkins, W. T. David and others. The collection also includes part of a Mass and a Te Deum by Giovanni Bononcini, 1747.