The external sequence of events is this. Syriac versions of Greek works were to be had, and these were now translated into Arabic by the Arabians; or translations were made from the Greek directly into Arabic. In the reign of Harun al-Raschid several Syrians are named who lived in Bagdad, and who had been called upon by the Caliphs to translate these works into Arabic. They were the first scientific teachers among the Arabians, and were chiefly physicians; hence the works they translated were on medicine. Among these translators was Johannes Mesue of Damascus, who lived in the reigns of Al-Raschid (_d._ A.D. 786), Al-Mamun (_d._ A.D. 833) and Al-Motawakkil (_d._ A.D. 847), rather earlier than the rise of the Turks to supremacy (A.D. 862); he was a hospital superintendent in Bagdad. Al-Raschid appointed him to make translations from Syriac into Arabic; he opened a public school for the study of medicine and all the sciences then known. Honain was a Christian, as was also his master Johannes, and belonged to the Arab tribe Ebadi; he applied himself to the study of Greek, and made a number of translations into Arabic, and also into Syriac, for example, Nicolaus _De summa philosophiæ Aristotelicæ_, Ptolemy, Hippocrate and Galen. Another is Ebn Adda, an eminent dialectician, who is quoted by Abulfaraj.[5] Among the works of the Greek philosophers it was almost exclusively the writings of Aristotle which were translated by these Syrians, and the later commentaries on the same. It was thus not the Arabians themselves who translated the above works. In the Arabic philosophy, which shows a free, brilliant and profound power of imagination, Philosophy and the sciences took the same bent that they had taken earlier among the Greeks. Plato with his Ideas or universals laid the foundation of the independent world of intellect, and established absolute existence as an existence which is manifestly present in the mode of thought; Aristotle developed, completed and peopled the realm of thought; the Neo-Platonic philosophy reached the further conception of the intelligible world as Idea of the existence which is independent in itself, of spirit; and then this first Idea, which we have already met with in connection with Proclus, passed over into a similar Aristotelian development and completion. Consequently it is the Alexandrian or Neo-Platonic Idea which forms the essential principle or basis of the Arabian as well as the Scholastic philosophy, and all that Christian philosophy offers; it is on it that the determinations of the Notion expend their strength, and around this that they career. A particular description of Arabian philosophy has in some parts but little interest; in other parts it will be found that the main dogmas of this philosophy have much in common with those of the Scholastics.