Papers of the Welsh-Canadian composer John Metcalf (1946- ) of Llanfair Clydogau, Ceredigion. The collection includes pencil scores of compositions, papers relating to the Banff Centre in Alberta, Canada, a set of programmes for the Swansea Festival of Music and the Arts (1968 onward), and audio-visual materials.

Additional papers were donated by John Metcalf, December 2021.

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.