Here are some suggestions that you might consider translating and relevant to Medieval Egypt:
Mohammad ibn Mohammad ibn Hamid al-Maraghi al-Jirjawi Nour al iyoon fi zikri Jirja min aahdi thalathati ghiroun
another text is by a Coptic patriarch that also details alot about the Medieval period:
Ta'rikh batarikat al-Kanisah al-Misriyah was edited and translated into English by B.T.A. Evetts under the title History of the Patriarchs of the Coptic Church of Alexandriab by Anba Sawiris Ibn El-Moqafa'a
Then you have the medieval Cairene historian named al-Maqrizi who wrote Khitat or Al-Mawa?iz wa?lI?tibar fi Dhikr al-Khitat
Any of those publications wil do for translation.