It is not clear from Eusebius’ language whether Aquila was successor of Lætus as viceroy of Egypt (as Redepenning assumes apparently quite without misgiving), or simply governor of Alexandria. He calls Lætus (in chap. 2) governor of Alexandria and of all Egypt, while Aquila is called simply governor of Alexandria. If this difference were insisted on as marking a real distinction, then Aquila would have to be regarded as the chief officer of Alexandria only, and hence subordinate in dignity to the viceroy of Egypt. The term used to describe his position (ἡγούμενον) is not, however the technical one for the chief officer of Alexandria (see Mommsen, Provinces of the Roman Empire; Scribner’s ed., II. p. 267 ff.), and hence his position cannot be decided with certainty. In any case, whether he succeeded Lætus, or was his subordinate, the dates of his accession to and retirement from office are unknown, and hence the time at which the persecutions mentioned took place cannot be determined with exactness. We simply know that they occurred after 203 (for Origen had already taken charge of the catechetical school, and some of his pupils perished in the persecutions) and before 211, the date of Severus’ death.