Steve on the recording aspects. Roud lists the Lomax recordings in 1938 and 1939. It took me a while to find the Doerflinger audio information; this record at LOC Doerflinger Tapes, gives the recording dates by Doerflinger as Jan 38 to Feb 40, so these two were recording at more or less the same time, but I presume independently. Bob Walser worked on the Doerflinger tape copy, do he may know more (and he published an article on Doerflinger too).

According to Roud, Paddy Get Back was recorded by Lomax in 39.

I don't have the info for Joanna Colcord.

Mick