Try again ...

'The [Old] Chisholm Trail' was one of the first radio ballads pre-dating even Ewan MacColl's.

http://research.culturalequity.org/home-radio.jsp

Lomax also chose the music for and performed in two subsequent folk song ballad opera broadcasts scripted by his wife, Elizabeth Lyttleton Harold: 'The Martins and the Coys' and 'The Chisholm Trail.'

The former is available on CD from Amazon. The latter is available here:

http://research.culturalequity.org/get-radio-detailed-show.do?showId=9

Enjoy!!

CJB