Thanks for resurrecting this old discussion!

This time through, I noticed several mentions of Skip James, but not mention of one of his greatest slow numbers, "Devil Got My Woman" (in which the words "devil got may woman" do not appear):

I'd rather be the devil, than be that woman's man
I'd rather be the devil, than be that woman's man
Aw, nothin' but the devil, changed my baby's mind
Was nothin' but the devil, changed my baby's mind

I laid down last night, laid down last night
I laid down last night, tried to take my rest
My mind got to ramblin', like a wild geese
From the west, from the west

The woman I love, woman that I loved
Woman I loved, took her from my best friend
But he got lucky, stoled her back again
And he got lucky, stoled her back again

Verses 2 and 3 are "floating lyrics" found in a whole lot of "different" songs, but the first verse (repeated as the last verse as well) seems to be pure original Skip James.