And one further observation. The Fresno State database asserts that Dylan likely adopted his version from hearing the 1937 Daugh Henson field recording but this seems unlikely. Both the Henson and Kazee versions include the "I always stay sing single version" not present in the Sandberg version, and neither include the "World's just a bottle" segment which I find first with Rolf Cahn and later Van Ronk. Seems to me much more likely Dylan heard Cahn's Folkways recording or learned the song from his friend Van Ronk who recorded it in 1964 but likely was performing it earlier.