Watermark: Crown with grapes.Text rubricated; marginal corrections in hand of copyist.Date in colophon: qad intahá mā utīḥa jamʻuhu fī ghurrat al-awwal min al-akhīr min al-thānī ʻashar min al-hijrah al-nabawīyah [25 September 1786?]."A treatise on number theory." David A. King, A Survey of the Scientific Manuscripts in the Egyptian National Library (Winona Lake, 1986), p. 114.