[16] In B.C. 327 Seleucus I. had been placed in charge of Syria and the East, and of Babylon—to which, with the aid of Antigonus, he added Susiana. In 316, owing to a quarrel with Antigonus, he fled to Egypt, but in 312 he re-entered Babylon. The era of the Seleucidæ dates from this event. Seleucus extended his dominions as far as the Oxus and the Indus. Not till 306 did he officially adopt the title of king. Gutschmid, op. cit. p. 24.
[17] Cf. E. Drouin, loc. cit.
[18] Diodotus seems to have prepared his subjects for this change of masters by issuing coins of the type struck by Antiochus II., but bearing his own portrait. Cf. Gardner, Greek and Scythian Coins, p. 20.
[19] Hist. x. ad fin. xi. 34.
[20] Gardner, Greek and Scythian Coins, p. 21.
[21] Cf. Justin, xii. 4: “Parthis deinde domitis prefectus his statuitur ex nobilis Persarum Andragoras: inde postea originem Parthorum reges habuere.”
[22] Parthian Coinage, Numismata Orientalia, vol. i. p. 2. Strabo, xi. 9. 2.
[23] Justin, xii. 6: “Imperiumque parthorum a monte Caucaso multis populis indicionem redactis usque flumen Euphratem protulit.”
[24] Ibid. xlii. 1.
[25] Gardner, ibid. p. 6.