1. The entire epitome of Xiphilinus (Books 36-80).
2. Vatican Excerpts of Peter Patricius (Nos. 1-38), compared with Dio's wording.
3. Vatican Excerpts of Peter Patricius (Nos. 156-191), containing that portion of the Historia Augusta which is subsequent to Dio's narrative.
4. Excerpts by John of Antioch, taken from Dio.
5. The "Salmasian Excerpts."
6. Some "Constantinian Excerpts," compared with Dio.
7. The account of Dio given by Photius and by Suidas.
8. Table of Fragments.
Boissevain's invaluable emendations and interpretations have been liberally used by the present translator, and some of his changes of arrangement have been accepted outright, others only indicated.