I'm intrigued by your source, Belfast - "Another Belfast man, now resident somewhere in Australia". That wouldn't have been Dave Scott? I believe Dave knew MacColl well and someone told me that he had moved to Australia some years ago.

I read Journeyman at the time it was published and recall being struck by the fact that MacColl made little or no mention of other prominent figures of the British folk revival. It was almost as though he and Peggy Seeger had engineered the whole movement themselves.