Poetry by 'Talhaiarn'; a work entitled 'Owen Glyndwr, a Cantata', with the Welsh words by John Jones ('Eos Bradwen'); an English translation by 'Talhaiarn'; poetry by Owen Rowlands ('Aled o Vôn').

The score and libretto of the cantata 'Nos Calan Gaeaf', otherwise known as 'Myrddin' or 'Cymru Fu, Cymru Fydd'.

Original hymns, poetry and songs, together with adaptations and translations of songs and poetry by 'Talhaiarn'; a copy of Llewelyn, a Dramatic Cantata, with Welsh words by 'Talhaiarn'; a poem to 'Talhaiarn' from Thomas Jones ('Taliesin o Eifion').

Manuscript and printed scores, together with related correspondence and papers, 1899-1938, relating to the cantata 'Aelwyd Angharad' by J. Lloyd Williams, words by Llew Tegid.