A joint production by the English polymath John Dee and the Italian mathematician Federico Commandino of this fragment 'On the division of surfaces', based on a manuscript attributed to a Muḥammad al-Baghdādī. 'The only other work of Euclid in pure geometry [besides the Elements and the Data] which has survived (but not in Greek) is the book On divisions (of figures) . . . It is mentioned by Proclus, who gives some hints as to its content . . . [which] enable us to check to some extent the genuineness of the books dealing with divisions of figures which have come down through the Arabic. It was John Dee who first brought to light a treatise De divisionibus by one Muḥammad Bagdadinus (died 1141) and handed over a copy of it (in Latin) to Commandinus in 1563; it was published by the latter in Dee's name and his own in 1570. Dee appears not to have translated the book from Arabic himself . . . The Latin translation may have been that made by Gherard of Cremona' (Heath, Greek Mathematics, vol. 1, p. 425).