bryd one brere – bird on a briar – is the earliest surviving English secular love song with a complete lyric, dated c. 1290–1320. The music was written on the back of a papal bull with a poor pen, so interpreting the notation is problematic in parts. A previous article (available here) addressed interpretation of the music and the poetic meaning of the words.
This article addresses a second problem of interpretation: the song was clearly intended for two voices, but the primary voice is missing, leaving us only with the second voice, the polyphonic accompaniment. Using the principles of medieval English polyphony, author Ian Pittaway has constructed three possible versions of the lead voice, based on the gymel, contrary motion, and the mixolydian mode. While we cannot know if any one of these constructions was the intention of the composer, the exercise serves as an illustration of the principles of English polyphony at the turn of the 14th century and an attempt to sing the song in the originally intended manner. All three two-voice versions of bird on a briar are sung in a multi-tracked illustrative video by Ian Pittaway.