The rare stanza beginning "My father lived and died a farmer", provided by dlitedw in 2008, is preceded in one version by the following:

I'm just a poorly lonesome traveller
Behind a mule that's powerful slow
A-plowin on to debt and worry
The only place that I can go.

The two appear together on a separate sheet in my file, in somebody else's handwriting. I have no idea of the date.