This15th-century witness is incomplete; it is missing about 30 folios: 6ff in the beginning; 3ff after f. 19; 7ff after f. 20; and 15ff after f. 105. On the other hand, it contains numerous geometrical drawings, diagrams and tables (in black and red ink), but few corrections and marginal notes.The treatise ends on f.119b; and the colophon provides the title "Kitāb al-tafhīm li-awāʾil ṣināʿat al-tanjīm" and the name of the copyist ʿAbd Allāh ibn Yaḥyá ibn ʿAbd Allāh al-Daraqanī [or Zaraqanī; Razaqanī] al-Ḥasanī al-Dāwūdī, who states he transcribed the work for himself (ʿallaqahu li-nafsi-hi), and gives the date Sunday, the end of Dhū al-Qaʿdah 833 [late August 1430].