Walters songs   were promoted by people from the uk folk revival the Godbolds, Peter Bellamy etc. He was encouraged to appear at festival and folk clubs by members of the uk folk revival., it is about time you credited those people who promoted and saved those songs, yes we all know walter saved them originally, but the people interested in those songs were people from the uk folk revival, they encouraged walter to sing out and put the songs in circulation to more people.
whether he was the greatest traditional singer is arguable, personally i prefer the singing and repertoire of Harry Cox, but that is personal opinion, just the same as you have a different opinion.
Roger Dixon clearly states that he knew a couple of the songs, check out from 8 40 to 913 onwards,
Roger also states that Walter realised that when he died that all the songs that he knew that had been handed on from his family that those songs would die with him , Roger then says that he knew one or two of them, HE SUGGESTED TO WALTER TO PUT THEM ON REEL TO REEL.and that Roger would take them to UK Folk Revialist Peter Bellamy, clear your ears out, or listen again, you inattentive person.Roger then goes on to say how Peter Bellamy forced his hand., by saying that he would arrive by train on a particular day
Start Listening and start giving credit to Peter Bellamy you miserable old curmudgeon