On the gathering of cannonballs (julal al-madāfiʿ) for their lead and the sending of a specimen to the Khalīfa.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 110
18/03/1306