Pyrrhonism, and this translation has been added to the critical
part of the work.

In making this translation, and in the general study of the
works of Sextus, the Greek text of Immanuel Bekker, Berlin,
1842, has been used, with frequent consultation of the text of
J.A. Fabricius, 1718, which was taken directly from the existing
manuscripts of the works of Sextus. The divisions into chapters,
with the headings of the chapters in the translation, is the
same as Fabricius gives from the manuscripts, although not used
by Bekker, and the numbers of the paragraphs are the same as
those given by both Fabricius and Bekker. References to Diogenes
Laertius and other ancient works have been carefully verified.

The principal modern authors consulted are the following:

Ritter, _Geschichte der Philosophie_, II. Auf., Hamburg,
1836-38.

Zeller, _Philosophie der Griechen_, III. Auf., Leipzig,
1879-89.

Lewes, _History of Philosophy_, Vol. I., London, 1866.

Ueberweg, _History of Philosophy_, IV. ed., translated by
Morris, 1871.

Brochard, _Les Sceptiques Grecs_, Paris, 1877.

Brochard, _Pyrrhon et le Scepticism Primitive_, No. 5, Ribot's