A man I met at a party recently asked me if I knew there was another Jean Shepherd who used to have a radio show. For years, people have asked me about the "real" Jean Shepherd, the man with the same name. A writer, humorist, screenwriter and Olympic-quality tale-teller, he died a year ago. I've discovered there are a great number of devotees of his radio show around these parts. I once got a letter from a reader of this column asking for an autograph and telling me he used to love my radio show...