Harp Song - The Golden Thread with Selected Arrangements for the Folk Harp by Mary Umbarger. The musical journey through this book of folk harp arrangements expose the player to music from the 12th to 20th centuries. Information about the tunes and composers, plus lyrics, stories and poems, give insight to the music and are valuable performance tools. You will enjoy music not usually found in harp repertoire that lies well on the harp with few lever changes.