On the letter send by Maḥmūd b. al-Wālid Aḥmad to Khalīfa, and which the latter transferred to ʿUthmān Diqna.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 341
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