Note 145 — LETTERS
Charles Lett Feltoe translation
This is a very obscure calculation, but the upshot of it may be as follows: Gallienus was associated with his father Valerian as Emperor seven years (253-60), then Macrianus usurped the power (in Egypt) for one year, or rather more; thus Gallienus regained the power in his ninth year (i. e. after midsummer 261). Gallienus’s original Edict of Peace was issued in Oct. 260, but the Rescript applying it to Egypt was delayed for some time. The Easter festival for which this letter was written, therefore, must have been that of 262.