conquest. He was the author of a commentary on Aristotle's Hermeneutica of which only fragments survive, of a treatise on the syllogisms of the Analytica Priora, and of epistles dealing with terms used in the Hermeneutica and on the difficult points in Aristotle's Rhetoric (cf. Brit. Mus. Add. 14660, 17156). In astronomy he wrote on "the Figures of the Zodiac" and on "the Astrolabe," the former of these is preserved in Br. Mus. Add. 14538 and has been published by Sachau (op. cit.), the latter in Berlin MS. Sachau 186 and published by Nau in the Journal Asiatique of 1899.
Athanasius of Balad who became Monophysite patriarch in 684 was a pupil of Severus Sekobt, and is chiefly known as the translator of a new Syriac version of Porphyry's Isagoge (Vatican Ms. Syr. 158. cf. Bar Hebraeus Chron. Eccles. ed. Abbeloos et Lamy. i. 287).
James of Edessa (d. 708 A.D.) also was a pupil of Severus Sebokt at the same convent, was made bishop of Edessa about 684 and abandoned this see in 688 as the result of his failure to carry out the reformation of the monasteries in his diocese: he retired to the monastery of St. James at Kaishun, between Aleppo and Edessa, but left this to become lecturer at the monastery of Eusebona, in the diocese of Antioch where "for eleven years he taught the psalms and the reading of the scriptures in Greek and revived the Greek language which had fallen into disuse" (Bar Hebr. Chron. Eccles. i. 291). Attacked
