Note 95 — Chapter IX · THE EUPHRATES FRONTIER AND THE PARTHIANS. (continued 2)
William P. (William Purdie) Dickson translation
The only fixed chronological basis is furnished by the Alexandrian coins, according to which Valerian was captured between 29th August 259 and 28th August 260. That after his capture he was no longer regarded as emperor, is easily explained, seeing that the Persians compelled him in their interest to issue orders to his former subjects (continuation of Dio, fr. 3).