_George_, who became “bishop of the Arabs” in 686, was himself a pupil of Athanasius of Balad and translated the whole logical Organon of Aristotle, of which his versions of the _Catagories_, _Hermeneutica_, and _Analytica Priora_ appear in Brit. Mus. Addit. 14659, each furnished with an introduction and commentary.
These names cover the whole period between the two schisms and the Muslim invasion and suffice to show that the Syriac speaking community continued diligent in the study of the Aristotelian logic and metaphysics, and also gave attention to medical and scientific studies. It is not exactly a brilliant or original form of cultural activity, for the most part it was only the transmission of received texts with the preparation of new translations, commentaries, and explanatory treatises, but this itself fulfilled an important function. The Muslim invasion made no change in the course of these studies: the Umayyads did not interfere with the schools and the Syriac students went their own way living a life quite apart from that of their Arab rulers. Now and then unscrupulous or angry clergy appealed to the Khalif against their fellow clergy and this was the commonest cause of interference which the historians describe as persecution. Such was the experience of _Henanieshu´_ who became Nestorian Catholicos in A.D. 686. The bishop of Nisibis made complaints against him to the Khalif `Abdul-Malik in consequence of which he was deposed, imprisoned, and then thrown over a cliff. He was not killed by his fall, though severely lamed; by the kindness of some shepherds he was sheltered and nursed back to health, and then retired to the monastery of Yannan near Mosul, resuming his patriarchal office after the death of the bishop of Nisibis, and holding it until his own death in 701 (Bar Heb. _Chron. Eccles._ Abbeloos et Lamy. ii. 135-140). Besides sermons, letters, and a biography of Dewada, he wrote an educational treatise on “the twofold duty of the school” as a place of religious and moral influence on the one hand, and of an academy of the humanities on the other (cf. Asseman BO.) iii. part I. 154 and also an “Explanation of the Analytica” (id).
_Mar Abha III._ became Nestorian Catholicos somewhere about 740 (133 A.H.) and produced a commentary on Aristotle’s logic (cf. Bar Heb. ii. 153).