Another possible means by which the diwan registers swelled was through the bulky entourages that often accompanied new governors to the province.
Immediately after the inauguration of the Egyptian diwan, Arab Muslims (and initially some mawali) registered to guarantee their 'ata'.
40) Diwan disbursements conformed to this new situation; thus, Syrian troops were paid by the diwan of Iraq.
46) Thus, new converts were allowed to join the diwan and draw a salary commensurate with their military service.
The nature of the payment Egyptian Arabs received, however, remained vague until 218/ 833, when the caliph al-Mufasim ordered Kaydar, the Turkish governor of Egypt, to remove Arabs from the diwan (the reasons for which are discussed below).
69) Subsequently, al-Layth was relieved of his duties as governor, and Mahfuz was appointed head of the diwan al-kharaj, where he made good on his promise to the caliph.
Immediately upon assuming control of the caliphate in 218/833, al-Muctasim sent a letter to Kaydar, the governor of Egypt, instructing him to remove the Arabs of the province from the diwan.
To al-Muctasim, the decision to exclude Arabs from the Egyptian diwan must have seemed long overdue.
Diwan may be literally understood as a "list" or "register.