My interest is primarily in the fact that the 'piece' was written down, which at the time was rare, I find it hard to believe that ancient musicians did not do what all musicians do - play by ear, pick up fragments from any source, travel to far away places - in this case probably Banbury Oxon (Friar Tuck singing about stampeeding cattle spooked by a buck breaking wind and wandering through the woods .....on his way to Banbury)