I found Brian's piece interesting. However, just on a very minor point, it seems to me that Copper does say that his grandfather was 'embarrassed', and the explanation of the context and audience that follows provide a reason for it. And being embarrassed is uncomfortable, more or less?

On the point about enjoying the music: I had always understood it that Sharp's main interest was in the tunes. I wonder which of his writings Brian could recommend for insight into his enjoyment of the musical side, something I myself sometimes think is ignored due to a focus on the words/text.   

I don't claim to know very much at all about Derrida, but I do know that within academia he is a controversial subject: differing Mudcat views on Ewan MacColl might give a sense of this.