Peter, I found a listing for it as a song by Elizabeth (Libba) Cotten on a reissue by Folkways, here, only on the album it is spelled Vastopol. Apparently it was Libba's distinctive style of guitar picking which then took the song name.

The album is Freight Train and other North Carolina songs #SF40009, CA40009 and CDNow had it for $12.99, BUT Dick Greenhaus at CAMSCO AND THE DT can probably get it for you, too!

katlaughing