I have long pondered the motive with which Michael Wharton, for long the author of the Daily Telegraph’s Peter Simple column, gave a memorable detail in his second volume of memories, A Dubious Codicil, about the habits of his rival Colin Welch: ‘He had a habit of picking his nose, occasionally tasting the extracted mucus or “bogey”, without any attempt to conceal himself, as most people would, behind a newspaper.’