Some of the Carpenter's informants:

Edwards Ashbury? - Swansea
Richard Warner - Cardiff
Hefrum Methias - Cardiff - contributed "Chester Commodore" which Carpenter annotates as (Welsh Song).
Capt.Jack Harris - Swansea.

However the collected songs - for Carpenter's Doctorial Thesis were all in English.

I think Mick Tems did some work bringing some of their songs to public performance.