Which preposition to use with siro

on Occurrences 1%

V. 8): Nos ad beatos vela mittimus portus Magni petentes docta dicta Sironis, and Servius say Neapoli studuit, and the Ciris mention Cecropus horrulus, and Cicero in all his references place Siro on the bay of Naples, but a fragment of a Herculanean roll of Philodemus locates the garden school in the suburbs of Naples.

Which preposition to use with  siro