Jan Morris was, one suspects, more prepared for death — to face that moment when one’s agent becomes one’s executor — than are many others. For one thing, she lived a long and eventful life, dying on Friday in Wales at 94. For another, she was forward-thinking enough to leave a book behind to be published upon the news of her pegging out. That manuscript, she cheerfully told an interviewer in 2012, is “with the publishers, waiting for me to kick the bucket!”