If Dr. Allenby thought she had any concept of what guilt was, then she was fooling herself. Guilt was what kept you awake in the middle of the night or, if you managed to sleep, poisoned your dreams. Guilt intruded upon any happy moment, whispering in your ear that you had no right to pleasure. Guilt followed you down streets, interrupting the most mundane moments with remembrances of days and hours when you could have done something to prevent tragedy but chose to do nothing.