Thanks for the link, Kirova. They also have a CD on the Field Recorders' Collective, and this song is actually on it.
A clip is on their bandcamp.com album site.

(I noticed you replied to Chris Seymour's post in the beginning of the thread)

Regarding the subject of Riley & Spencer, I'm not sure, but it seems

Fields Ward got it from a different source than Jarrell, who learned it in I guess the 1920s.

The versions also had the 'key of A' in common, and were learned as 'guitar songs'.
Jarrell made up a fiddle arrangement from what his brother-in-law played on guitar.
Later he changed the key to an approximate D, at a to me, unknown date.
(haven't gone through all the audio interviews with him yet ;)