Although obviously of much greater antiquity, the hymn-tune Y DELYN AUR (The Golden Harp) was first published only in 1879. The tune is inextricably linked with the words of William Williams, Pantycelyn's hymn bearing the same title. In this arrangement Y Delyn Aur is interwoven with the ancient plainsong melody Te lucis ante terminum, the office hymn for Compline.
A choral arrangement was made at the request of harpist Brynmor Williams and is dedicated to the Auckland Welsh Choir and its conductor Diana Rhodes. The harpist uses the score Adlais 022, the choir use Adlais 153.
The cover engraving is by Liliane Schaefer-Minerbe (1934-2003).