"as the witnesses to your life diminish, there is less corroboration, and therefore less certainty, as to what you are or have been. Even if you have assiduously kept records--in words, sound, pictures--you may find that you have attended to the wrong kind of record-keeping. What was the line Adrian used to quote? "History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation."