Thanks a lot for that, Masato.
No, there doesn't seem any trace of it in the book - I wonder where M Ted got the info that it did? Maybe it is mentioned in Harold Courlander's introduction to the new edition mentioned in M Ted's post.
Anyway now the song in some form is traced back to 1912, which would be well within the lifetime of people who had been slaves. It'd be interesting to see how far the version as collected by Parks was the same as the one that's current now.
I'm glad to see that version of the story, which puts more flesh on the bare bones. That mention of the story of Peg-Leg being "in the records of the Anti-Slavery Society" is fascinating. It'd be great to have that chased up and brought here.