During Nero's reign of terror, Pliny avoided working on any writing that would attract attention to himself. His works on oratory in the last years of Nero's reign (67, 68) focused on form rather than on content. He began working on content again probably after Vespasian's rule began in AD 69, when the terror clearly was over and would not be resumed. It was to some degree reinstituted (and later cancelled by his son Titus) when Vespasian suppressed the philosophers at Rome, but not Pliny, who was not among them, representing, as he says, something new in Rome, an encyclopedist (certainly, a venerable tradition outside Italy).