 The translation movement continued to pick up momentum through the ninth century, and by the 830s a circle of translators were loosely coordinated around Abû Yûsuf Ya‘qûb b. Ishâq al-Kindî (d. c. 870). Kindî produced a short overview of the whole of the Organon (translated in Rescher 1963a), and members of his circle produced: an epitome of and commentary on the Categories; an epitome of On Interpretation; a version of the Sophistical Fallacies; and probably an early translation of the  Rhetoric.[3] 