thank you so much everyone for your responses :-) I am really sorry my reply is so delayed i went away for a while and found there was no internet there! :-( From the research i am gathering i am making a musical family tree to find out how the song has been passed along, a timeline, and a radio program discussing my findings. As this is academic work i will not be able to make it public until June and will only be allowed to show the family tree and timeline. The wide variety of responses is very interesting! I will post back here in the next few days to continue the discussion :-) thanks Emily
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