I am also sorry to hear of Peter's death. I can't claim to know him well, but a few years ago I emailed him out of the blue with a query about a folk acetate I'd bought in a second hand record shop, that I had reason to believe he was involved with. That turned out to be the case, and he was very helpful in his reply, giving details of the recording sessions, etc. He was interested to know where I'd got the record, etc. Fortunately, I didn't know about his reputation for having to be approached with care, otherwise I might have hesitated to contact him. As others have said, his was a significant contribution to folk music. RIP Peter, and condolences to his family.