Manuscript and printed copies, 1905, 1948, of anthems, hymn-tunes and songs, composed or arranged by T. Osborne Roberts, including 'Berceuse' (ff. 8-10), 'I Loved a Lass' (ff. 32-35) and 'A Lullaby' (ff. 53-55), words by George Withers; 'Britain', words by John Ceiriog Hughes (Ceiriog) (ff. 16-17 verso); 'Seren fechan, Seren dlos' (f. 21 recto-verso) and 'Seren fechan yn y nos' (ff. 22-23 verso), words by Thomas Jones, Cerrigellgwm; 'Hiraeth' (ff. 30 recto-verso, 107 verso-108) and 'Y Mynydd' (ff. 78-81), words by Robert Williams Parry; 'The Kingfisher', words by William Henry Davies (ff. 38-40), and 'Y Lloer', words by W. H. Davies with a Welsh translation by R. Williams Parry (ff. 64-65); 'Medi' (ff. 58-61) and 'Y Wlad Annwyl Hon' (f. 133 recto-verso), words by Eliseus Williams (Eifion Wyn); 'Morfudd fy Mûn', words by Gerald Griffin translated into Welsh by Caradog Prichard (ff. 66-71 verso); 'Nefoedd', words by John Roberts (Ieuan Gwyllt) (ff. 82-90 verso); 'Stars of the Summer Night', words by Henry Wadsworth Longfellow (ff. 131-132 verso); and 'Ymson', words by Heinrich Heine translated into Welsh by Sir John Morris-Jones (ff. 134-141 verso).
Notes are added in the hand of Leila Mégane on ff. 138, 143, 150-158.

Holograph music compositions, 1918-19 and undated, by George Stephen Evans, Aberystwyth and Llanilar, including a short anthem or introit, 'O Love the Lord', to words from Psalm 31; two version of a song, 'Solitude', to words by Henry Kirke White ('To my friend W. D. Owen'); a song, 'Doreen', to words by Marina Benbow; and a 'five fold Amen' for five voices.

Music (anthems, hymn- and psalm-tunes, etc.) by Thomas Edwards - 'Festival Te Deum', 'Magnificat a Nunc Dimittis', 'Te Deum Laudamus', 'Peace, perfect peace', 'The Royal Welsh [sic] Fusiliers', 'Coroniad y Brenin', 'Emyn y Diwygiad', 'Anthem Genedlaethol', etc.; together with 'Three Double Chants' by E. J. Hopkins, 1895, transcribed in 1896, and a signed presentation copy by the author to Thomas Edwards, 1921, of Caradog Roberts: Yr Arglwydd yw fy Mugail: Anthem Gynulleidfaol.

Eight compositions by, and in the autograph of, T. Hopkin Evans: - a song for children's choir: 'Croesaw i'r Gwcw' (c. 1900); a part-song: 'Crowns of Golden Light (Ei aur Goronau Ef)' written to the memory of C. E. J. Owen, Hengwrt-ucha, 1907; a song: 'Memories-Atgofion' dedicated to Ll. R. Bowen (c. 1904); 'Song of the Spheres: Cân y Planedau', 1928; a carol- lullaby: 'Clychau Bethlehem: the Bells of Bethlehem', 1933; a simple anthem : 'Hosanna' (c. 1913); an anthem: 'Gwywa y Gwelltyn (Gair ein Duw)' (c. 1905); and a composition for the piano: 'Enchantement' (c. 1906).

Manuscript scores of sacred or liturgical works, consisting mainly of hymns and anthems, composed or arranged by Mansel Thomas for mixed voices.