 Excerpts from Didymus's Biblical commentary have been found in the Catena.Modern knowledge of Didymus has been greatly increased by a group of 6th or 7th century papyrus codices discovered in 1941 at a munitions dump near Toura, Egypt (south of Cairo).These include his commentaries on Zechariah, Genesis 1-17, part of Job and parts (of uncertain authenticity) on Ecclesiastes and Psalms 20-46.