Willie-O, Alan Ross was talking about the version posted right before HE posted, and if he said anything about his father writing 'the "correct" or "official" version', that part's invisible on my browser.

His father wrote that version and should receive credit as well as royalties. More of the story's in other threads - see links at top of page. Other that that, I'll admit it gets a bit confusing when there are so many sets of modern lyrics to a tune that is (as far as we can prove) modern.