This swelling of the rivers begins about June; they do not attain their full height until August. Moreover, the description of the battle, as given both by Arrian and by Curtius, implies that it took place after the rainy season had begun (Arrian, v. 9, 7; v. 12, 5. Curtius, viii. 14, 4). Some critics have proposed to read _Metageitnion_ (July-August) as the month, instead of _Munychion_; an alteration approved by Mr. Clinton and received into the text by Schmieder. But if this alteration be admitted, the name of the Athenian archon must be altered also; for Metageitnion of the archon Hegemon would be eight months earlier (July-August, 327 B. C.); and at this date Alexander had not as yet crossed the Indus, as the passage of Aristobulus (ap. Strabo. xv. p. 691) plainly shows—and as Droysen and Mützel remark. Alexander did not cross the Indus before the spring of 326 B. C. If, in place of the archon Hegemon, we substitute the next following archon Chremês (and it is remarkable that Diodorus assigns the battle to this later archonship, xvii. 87), this would be July-August 326 B. C.; which would be a more admissible date for the battle than the preceding month of Munychion. At the same time, the substitution of Metageitnion _is_ mere conjecture; and seems to leave hardly time enough for the subsequent events. As far as an opinion can be formed, it would seem that the battle was fought about the end of June or beginning of July 326 B. C. after the rainy season had commenced; towards the close of the archonship of Hegemon, and the beginning of that of Chremes. [542] Arrian, v. 20; Diodor. xvii. 95. Lieut. Wood (Journey to the source of the Oxus, p. 11-39) remarks that the large rivers of the Punjab change their course so often and so considerably, that monuments and indications of Alexander’s march in that territory cannot be expected to remain, especially in ground near rivers. [543] Arrian, v. 20. [544] Arrian, v, 23, 24; Curtius, ix. 1, 15.