Philosophy as an academic subject became widespread in the days of the Ptolemaic kings of the Greeks after the death of Aristotle in Alexandria until the end of the woman’s reign [i.e., Cleopatra’s]. The teaching of it continued unchanged in Alexandria after the death of Aristotle through the reign of thirteen kings... Thus it went until the coming of Christianity. Then the teaching came to an end in Rome while it continued in Alexandria until the king of the Christians looked into the matter. The bishops assembled and took counsel together on which parts of [philosophy] teaching were to be left in place and which were to be discontinued. They formed the opinion that the books on logic were to be taught up to the end of the assertoric figures [ Prior Analytics, I.7] but not what comes after it, since they thought that would harm Christianity. Teaching the rest [of the logical works] remained private until the coming of Islam when the teaching was transferred from Alexandria to Antioch. There it remained for a long time until only one teacher was left. Two men learned from him, and they left, taking the books with them. One of them was from Harran, the other from Marw. As for the man from Marw, two men learned from him..., Ibrahim al-Marwazi and Yuhanna ibn Haylan. [Al-Farabi then says he studied with Yuhanna ibn Haylan up to the end of the Posterior Analytics ].