P.Lond. I 113.10, the exile of patriarch Kyros of Alexandria, and the Arab conquest of Egypt by Jankowiak, M

“…Nikephoros’ account of several Roman campaigns to defend this province in the years preceding the invasion of ʿAmr b. al-ʿAs in 640 relocates the most detailed narrative of the Muslim conquest of Egypt, the Chronicle of John of Nikiu, in its context: that of the aftermath of the defeat of a major Roman army sent to Egypt in 639. …”