 Somewhat later, perhaps from the 850s, the great Syriac Christian translators Hunayn ibn Ishâq (d. 873) and his son Ishâq ibn Hunayn (d. 910) began to produce integral translations of complete works from the Organon, generally by way of Syriac translations, some of which dated back to before the Arab conquests. One or the other (it is uncertain from the sources) translated the Categories, Ishâq translated On Interpretation, Hunayn seems to have collaborated with the otherwise unknown Theodorus to translate the Prior Analytics, father and son both seem to have had a hand in producing a new Syriac translation of the Posterior Analytics, and Ishâq provided revised translations of the Topics and the Rhetoric. Perhaps it was someone in this circle who translated the Poetics into  Syriac.[4] 