The series comprises typescripts of radio lecture-recitals and talks by W. S. Gwynn Williams, entitled 'The Spirit of Welsh Music', 1925 and 1927, 'Nationality in Music', 1927, 'The Making of Music', 1927, 'The Music of Wales and the Eisteddfod', 1929, and a few related typescript programmes. Some of these were broadcast during the period he was in charge of Welsh programmes from the Irish stations at Dublin and Cork, 1928-1930.