[Footnote 2: Mommsen (Hermes VI, pp. 82-89); Haupt (Hermes XIV, pp.
36-64, and XV, p. 160); Boissevain (Program, Rotterdam, 1884).]

The _Excerpts Concerning Virtues and Vices_ exist in a manuscript of
the tenth century at the library of Tours, originally brought from the
island of Cyprus and sold to Nicolas Claude Fabre de Peiresc, who
lived from 1580 to 1637. Apparently it is a collection made at the
order of Constantine VII. Porphyrogenitus. It was first published at
Paris by Henri de Valois in 1634. The collection consists of
quotations from Polybius, Diodorus Siculus, Nicolas Damascenus,
Dionysius of Halicarnassus, Appian, Dio, John of Antioch, and others.

The _Excerpts Concerning Judgments_ are found in a Vatican manuscript
known as Codex Vaticanus Rescriptus Græcus, N. 73. Angelo Mai first
published the collection at Rome in 1826. They consist of many
narrative fragments extending over the field of Roman History from
early to late times, but fall into two parts: between these two parts
there is a gap of six or more pages. That the former set of fragments
is taken directly from Dio all scholars are ready to allow. In regard
to the latter set there have been, and perhaps still are, diverse
opinions. The trouble is that on the one hand these passages do not
end with the reign of Alexander Severus, where Dio manifestly ended
his history, but continue down to Constantine and (since the
manuscript has lost some sheets at the close) possibly much farther:
and on the other hand the style and diction differ considerably from
Dio's own. It was once the fashion to say that as many of the
fragments as come before the reign of Valerian (A.D. 253)[3] came from
Dio's composition, but that the remainder were written by an unknown
author. Now, however, it is generally agreed that all the excerpts of