you wont find a recorded copy of this probably because it is like a 15th century tune, but the lyrics say" a silver swan, when living had no note,when dead arrive, unlock her silent throat. and leaning her head against the reedy shore thus sang and sang no more. oh death come close my eyes, more geese than swans now live, more fools than wise".
For some reason, GallowsPole-led zeppelin comes to mind.