The whole two years 79--77 B.C. were spent in the society of Greek philosophers and rhetoricians. The first six months passed at Athens, and were almost entirely devoted to philosophy, since, with the exception of Demetrius Syrus, there were no eminent rhetorical teachers at that time resident in the city[14]. By the advice of Philo himself[15], Cicero attended the lectures of that clear thinker and writer, as Diogenes calls him[16], Zeno of Sidon, now the head of the Epicurean school. In Cicero's later works there are several references to his teaching. He was biting and sarcastic in speech, and spiteful in spirit, hence in striking contrast to Patro and Phaedrus[17]. It is curious to find that Zeno is numbered by Cicero among those pupils and admirers of Carneades whom he had known[18]. Phaedrus was now at Athens, and along with Atticus who loved him beyond all other philosophers[19], Cicero spent much time in listening to his instruction, which was eagerly discussed by the two pupils[20]. Patro was probably in Athens at the same time, but this is nowhere explicitly stated. Cicero must at this time have attained an almost complete familiarity with the Epicurean doctrines. There seem to have been no eminent representatives of the Stoic school then at Athens. Nor is any mention made of a Peripatetic teacher whose lectures Cicero might have attended, though M. Pupius Piso, a professed Peripatetic, was one of his companions in this sojourn at Athens[21]. Only three notable Peripatetics were at this time living. Of these Staseas of Naples, who lived some time in Piso's house, was not then at Athens[22]; it is probable, however, from a mention of him in the De Oratore, that Cicero knew himm through Piso. Diodorus, the pupil of Critolaus, is frequently named by Cicero, but never as an acquaintance. Cratippus was at this time unknown to him.