Barry, only just remembered I have a Lovin Spoonful album from 1966 or 67, with a lot of songs like Wild About My Lovin' (which I think Sebastian wrote). I have the impression though that a lot old jug songs were written in the 30's - probably based on the feel of the tunes more than anything else. Not a field that I know much about, just like it, particularly live performances. In Australia Mick Conway seems to be the one person who has made his mark with this music.
Regards
John