(11)
I. Vaticanus A (15)
I. Parisinus A (17)
II. Mediceus B (15)
III. Parisinus B (15)
III. Venetus B (15)
III. Vaticanus B (15)
I. and III. Vesontinus (15)
III. Turinensis (16)
III. Escorialensis (?)
I. Codex Vaticanus graecus No. 1288 (5-6).

Mediceus A contains practically Books Thirty-six to Fifty-four, and
Venetus A Books Forty-one to Sixty (two "decades"). As they are both
the oldest copies extant and the sources of all the others, modern
editors would confine themselves to them exclusively but for the fact
that in each some gaps are found. In Mediceus A, for instance, two
quaternions (sixteen leaves) are lacking at the start, Leaf 7 is gone
from the third quaternion, Leaves 1 and 8 from the fourth; from the
thirty-first (now Quaternion 29) Leaf 1 has been cut, from the
thirty-third and last Leaf 5 has disappeared. Likewise in Venetus A
there are some gaps, especially near the end, in Book Sixty, where
three leaves are missing. Hence (without stopping to take up gaps and
breaks in detail) it may be said that the general plan pursued at the
present day is to adopt a reading drawn for each book from the
following sources respectively:

Book 36. Mediceus A, with lacuna of chapters
3-19 incl., supplied by the
mutual corrections of Vaticanus
A and Parisinus B.

Books 37 to 49. Mediceus A.

Books 50 to 54. Vaticanus A (vice Mediceus A).

Books 55 to 59. Venetus A.

Book 60. Venetus A, except chapter 17, sections
7 to 20, and chapter 22,
section 3, to chapter 26, section
2,--two passages supplied by
Mediceus B.

What knowledge has the world of the first thirty-five books of Dio's
Roman History? To such a question answer must be made that of this
whole section the merest glimpse can be had. It is here that we
encounter the name of Zonaras, concerning whom some information will
now be in order. Ioannes Zonaras was an official of the Byzantine
Court who came into prominence under Alexis I. Comnenus in the early
part of the twelfth century. For a time he acted as both commander of
the body-guard and first private secretary to Alexis, but in the
succeeding reign,--that of Calo-Ioannes