The guy who wrote that note probably didn't knew this:
The song, sung by sailors when hauling ropes on their sailing ships, was included by Robert Louis Stevenson in his classic novel "Treasure Island" published in 1883.
In the note is mentioned that he did reseach. So he probably picked it up somewhere.
That doesn't mean that he not altered it or added to it. In the note is also mentioned that it's possible...
(that's a way of covering your back when you're not sure)
So far I think I seen 3 or 4 different lyrics throughout time.
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