these lectures must have been delivered in one of the centres of
Stoicism. As Alexandria and Athens are out of the question, all
testimony points to Rome as having been the seat of the
Pyrrhonean School, for at least a part of the time that Sextus
was at its head. We would then accept the teacher of Sextus, in
whose place he says he taught, as the Herodotus so often
referred to by Galen[1] who lived in Rome. Sextus' frequent
references to Asclepiades, whom he mentions ten different times
by name in his works,[2] speak in favour of Rome in the matter
under discussion, as Asclepiades made that city one of the
centres of medical culture. On the other hand, the fact that
there is no trace of the _Hypotyposes_ 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.