Pádruig Breathnach’s Ceól Ár Sínsear of 1923, probably his most influential Irish-language publication, is a revised, expanded and through-paginated final edition of the volume which made its first appearance in 1920 as a hardback collection of the earlier seven penny booklets of the title. Confusingly, these seven had earlier been issued separately and as a single 1913 hardback volume under the title Fuínn na Smól, and had themselves incorporated many of the contents of Breathnach’s first Cnuasachd Bheag Amhrán booklets. The 1923 edition provided the words for his 1924 and 1925 Traditional Irish Airs collections of arranged melodies in staff notation. The three, comprising a substantial body of songs for voice and piano and for school choirs, would hold the field until the 1960s.