"no suggestion that this was a public exercise. "
Then how would anybody know MacColl analysed Dylan's songs if he didn't discuss them. I can't find any reference to him having done so, other than the Speedwell article (1965); at the time many people in the revival (described by Edward Lee as 'The Old Guard') looked on Dylan as a diversion to their aim of persuading folk enthusiasts examining their own traditions rather than turning to the US, as they had in the past - a suggestion of Alan Lomax's in the early 50s.
Sorry - this is all a bit of a waste of time.
In the sixties everybody (for or against) was talking about Dylan - Dylan moved away from folk song and did something else - the songs being cited here are at least four decades old.
As far as I know, MacColl seldom commented on what was going on in the revival - except maybe in privare conversations - there; I'd be very grateful if aybody could point out any examples of him having done so and where I can get hold of them.
Jim Carroll