I understood that almost ALL of the Adderbury dances were to songs, possibly from a time when they didn't have a musician.

This may be the same for many other traditional/extinct sides. In fact, almost all of the dance tunes are known as songs anyway. The assumption is that the dances were done to what the musician could play.

(Anybody know a song called Trunkles? Did anyone establish what a Trunkle IS?)