Severus takes vengeance on the Pretorians who were the assassins of Pertinax and enters the city (chapters 1, 2). Prodigies which portended the sovereignty to Severus (chapter 3). Funeral procession which he superintended, in honor of Pertinax (chapters 4, 5). War of Severus Augustus against Pescennius Niger (chapters 6-9). The storming of Byzantium (chapters 10-14).