Walter sang the songs from his family, that is what his audience were expecting, Walter had not sang out for many years because local people scorned his family songs, when he was discovered by the uk folk revival, he sang for an audience from the uk folk revival who wanted to hear his family songs,Walter obliged, he sang for an audience who atlast wanted to hear those songs, previously to this he had not sung out because in his own words local people did not want to hear them, he sang them at home. here is a documentary[ which you are fmiliar with] about Walter which confirms this.

https://www.youtube.com/watch?v=B95JAQe1Wt
Jim, you are so sexy.