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.

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').

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

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').