I have received the email today from Sian, Peter's wife, as a subscriber to the Lost Cousins Newsletter, which followed up a mail earlier this month I think, saying that Peter had medical issues.
I know that everyone here didn't appreciate Peter's style, but for myself I find that this news is like the loss of a friend, who wrote every month to tell me interesting facts, give me guidance, and add personal details to a 'letter'. I agree with PrawnCocktail that this is a huge loss to the Family History research community.
I am very sad at his loss, and that of his wife who participated with gardening tips on some of the newsletters.