The loss on the side of Alexander is said to have been very small. Twenty-five of the Companion-cavalry, belonging to the division under Ptolemy and Amyntas, were slain in the first unsuccessful attempt to pass the river. Of the other cavalry, sixty in all were slain; of the infantry, thirty. This is given to us as the entire loss on the side of Alexander.[199] It is only the number of killed; that of the wounded is not stated; but assuming it to be ten times the number of killed, the total of both together will be 1265.[200] If this be correct, the resistance of the Persian cavalry, except near that point where Alexander himself and the Persian chiefs came into conflict, cannot have been either serious or long protracted. But when we add farther the contest with the infantry, the smallness of the total assigned for Macedonian killed and wounded will appear still more surprising. The total of the Persian infantry is stated at nearly 20,000, most part of them Greek mercenaries. Of these only 2000 were made prisoners; nearly all the rest (according to Arrian) were slain. Now the Greek mercenaries were well armed, and not likely to let themselves be slain with impunity; moreover Plutarch expressly affirms that they resisted with desperate valor, and that most of the Macedonian loss was incurred in the conflict against them. It is not easy therefore to comprehend how the total number of slain can be brought within the statement of Arrian.[201] [199] Arrian, i. 16, 7, 8. [200] Arrian, in describing another battle, considers that the proportion of twelve to one, between wounded and killed, is above what could have been expected (v. 24, 8). Rüstow and Köchly (p. 273) state that in modern battles, the ordinary proportion of wounded to killed is from 8:1 to 10:1. [201] Arrian, i. 16, 8; Plutarch, Alexand. 16. Aristobulus (apud Plutarch. _l. c._) said that there were slain, among the companions of Alexander (τῶν περὶ τὸν Ἀλέξανδρον) thirty-four persons, of whom nine were infantry. This coincides with Arrian’s statement about the twenty-five companions of the cavalry, slain.