hey wow man - noddy noddy noe!!! silly silly very silly I mean how could one even begin to trace the origin of a strain/theme - there are likely bundles of tunes like the Green Sl one and they too are difficult to trace. Come to think of it even modern tunes share 'phrases' etc these are sometimes borowed etc. I think all music has no nationality but may have a national charicter according to the player. I go with the accepted origin of the tune viz King Henry. English folk tunes display simple but beautiful structures and this one is a good example. I suppose with added embellishment any tune takes on a new image, then there may be changes to it's rhythm etc making it unrecognizable. The reverse is also possible. Can't now think of good examples. Suppose the 'classical' composers used lots of themes from folk music too. Thas is a fascinating topic. :)