I'm going to be vague here. A couple of years ago I tried out an old piece of music, maybe a country dance, maybe a baroque piece, maybe a German tune. And I said to myself "Funny! That's the tune to the Green Hills of Tyrol."

I wish I could remember where I encountered the tune, but I can't. Nonetheless, the reason they say that Iain MacFadyen arranged is that he didn't compose it, he borrowed it.