i.e., magister officiorum, one of the great state officers under the Constantinian constitution. He had control over posts, police, arsenals, and the imperial correspondence and, from his authority in the palace, was a kind of “comptroller,” or “master of the household.” cf. Rufinus, p. 123.
Editorial footnote · Letters, Chapter uncertain; original source section: Letter 90, editorial note cite_note-1 · Original source