Whereas the original was divided arbitrarily into books, Xiphilinus divided his condensation into "sections," each containing the life of one emperor. Readers must further note that the present division of Books Seventy-one to Eighty dates only from Leunclavius (1592, first edition) and is not necessarily correct. Improvements in arrangement by Boissevain (latest editor of Dio entire) are indicated in the present translation, though for convenience of reference the old headlines are still retained. Before speaking of the editions through which Dio's _Roman History_ has passed it seems desirable to summarize briefly the condition of the whole as explained in the preceding pages. Here is a bird's-eye view of the whole situation. Books 1-21 exist in Zonaras and various fragments. " 22-35 exist in fragments only. " 36-54 exist in Dio's own words, and are found in universally approved MSS. " 54-60 exist in generally approved MSS. " 60-69 exist in Xiphilinus and excerpts. Book 70 exists in fragments only. Books 71-77 exist in Xiphilinus and excerpts. " 78, 79 exist in Dio's own words (oldest MS). Book 80 exists in Xiphilinus. EDITIONS. A brief list of important editions of this author is appended; the order is chronological. 1. N. Leonicenus.--Italian translation of Books 35 to 60. Venice, 1533. Free, and with many errors. 2. R. Stephanus.--Greek text of Books 35 to 60. Paris, 1548. Work well done, but based on a poor MS. 3. Xylander.--Latin translation of Books 35 to 60, with a brief Latin index. Basle, 1557. This version was made from No. 2. 4. Baldelli.--Italian translation of Books 35 to 60. Venice, 1562. 5. H. Stephanus.--A second edition of No. 2 with Latin translation of No. 2 added. A few corrections have been made and the Latin index is a little fuller. Paris, 1591. 6. Leunclavius.--A second edition of No. 3, somewhat emended, _and with Books 61 to 80 (Xiphilinus) added_; also containing _Orsini's Excerpts Concerning Embassies_ (in Greek and Latin), notes of Leunclavius, and a still fuller Latin index. Frankfurt, 1592. 7. Leunclavius.--Posthumous edition. Text of Dio and of Xiphilinus (the latter from Nero to Alexander Severus). Corrections of R. Stephanus in Dio proper, and of Xylander in both Dio and Xiphilinus, notes of Leunclavius on Dio, and notes of Orsini on _Excerpts Concerning Embassies_. Same Latin index as in No. 6. Hanover, 1606.