On the matter of buying cows to build a waterwheel on the Aṭbara River and the buying of hoses.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 268
15/08/1309