typoses_ in later Roman
literature, with the one exception of the works of Hippolytus,
as opposed to the wide-spread knowledge of them shown in the
East for centuries, is incontestable historical proof that the
Sceptical School could not long have had its seat at Rome. From
the two passages given above from Sextus' work against physics,
he must either have written that book in Alexandria, it would
seem, or have quoted those passages from some other work. May we
not then conclude, that Sextus was at the head of the school in
Rome for a short time, where it may have been removed
temporarily, on account of the difficulty with the Empiricists,
implied in _Hyp_. I. 236-241, or in order to be better able to
attack the Stoics, but that he also taught in Alexandria, where
the real home of the school was certainly found? There it
probably came to an end about fifty years after the time of
Sextus, and from that centre the Sceptical works of Sextus had
their wide-spread influence in the East.

[1] Galen VIII. 751.

[2] Bekker _Index_.

The books of Sextus Empiricus furnish us with the best and
fullest presentation of ancient Scepticism which has been
preserved to modern times, and give Sextus the position of one
of the greatest men of the Sceptical School. His works which are
still extant are the _Pyrrhonean Hypotyposes_ in three volumes,
and the two works comprising eleven books which have been united
in later times under the title of [Greek: pros mathematikous],
one of which is directed against the sciences in general, and
the other against the dogmatic philosophers. The six books
composing the first of these are written respectively against
grammarians, rhetoricians, geometricians, arithmeticians,
astronomers and musicians. The five books of the latter consist
of two against the logicians, two against physics, and one
against systems of morals. If the last short work of the first
book directed against the arithmeticians is combined with the
one preceding against the geometricians, as it well could be,
the two works together would be divided into ten different
parts; there is evidence to show that in ancient times such a
division was made.[1] There were two other works of Sextus which
are now lost, the medical work before referred to, and a book
entitled [Greek: peri psuches]. The character of the extant
works of Sextus is similar, as they are all directed either
against science or against the dogmatics, and they