This collection investigates the preservation and adaptation of traditional Welsh folk melodies through the lens of classical arrangement. The author, D. Vaughan Thomas, utilizes his expertise in composition to bridge the gap between oral folk traditions and formal concert performance. By providing both the original Welsh lyrics and English translations, the work serves as a bridge for performers to access the cultural nuances of these specific regional songs.

The collection is regarded as a functional resource for vocalists and pianists interested in the intersection of classical arrangement and regional folk traditions. Its utility lies in the accessible pairing of voice and piano, making it a standard reference for those exploring Welsh musical history.