Note 4 — BOOK I.—CHAPTER I.

Εἰς Καστωλοῦ πεδίον.] In each of the provinces of the Persian empire, certain open places, plains or commons, were appointed for the assembly and review of troops. See i. 2. 11; 9. 7; Hellen. 43. Heeren, Ideen, vol. ii. p. 486. Castolus is mentioned as a city of Lydia by Stephanus of Byzantium. Kühner.