On one occasion I mentioned to Peter Kennedy that I knew Bob and was surprised to find that Peter did not share my enthusiasm for Bob's singing. It never entered my mind that Peter may have known something about Bob that was unknown to me.

There's the quote you refer to Dick. It is the only time that Peter Kennedy is referred to in the article.

I once sat alone in a bar when the Copper Family were on in the next room. Gradually the bar filled up and each time another person came in the conversation went "What are you doing in here? I thought you would be in listening to the Coppers". And each time the answer came "Not a great fan of the Coppers".

It doesn't occur to me either that Peter knew something about Bob's singing that Bob didn't, it does occur to me that Peter did not share Mike's enthusiasm for Bob's singing.

But let's assume you are correct. Let's assume that Peter Kennedy knew that Bob had learnt his songs from manuscripts rather than orally and thus dismissed him as a traditional singer. Which is emphatically not what Mike Yates said but let's not have the facts spoil a good story.

How many others were there?

Who else did Peter make judgements about rather than go on the merits of the singer? And what was the basis of his judgement? Do you know?