579
1. he said it was better to throw the other things into the river
2. you, O men, have a very great opportunity
3. Aristippus had no fewer than three hundred cavalrymen
4. it is better to endure these things than to quit
5. turning about, most fled through the river with all their might
6. these men claim to be no worse than the captains
7. for it is far easier to complete the road
8. Clearchus had more than forty horsemen in his army, and most of them (were) Thracians
9. let us change these things, so that as many of us as possible may be under arms, and as few as possible carrying baggage
10. when Cyrus, while still a child, was being educated with both his brother and other children, he was considered in all things the best of all

581
Indeed Cyrus advised this to his generals and captains. Gaulites, an exile from Samos, who was present and in Cyrus? confidence, said, ?And yet, O Cyrus, some are saying that (the) many things you now promise ? being in terrible danger(s) ? you will forget if you bring to a successful end what you are making war against ? they tell you. And some also say that, not even if you should wish, would you be able to do/make-good the things you promise?

580
b. [face=SPIonic]plei/onoj[/face] in the singular – as this sentence seems to express a regret, I would translate it as a « present condition contrary to fact » (HWS 1397), so [face=SPIonic]plei/onoj a)\n a)/cioi h)=men ei) ta o(/pla ei)/xomen[/face], but your Greek is nevertheless correct.

581
« in Cyrus confidence » : yes, a « trusty companion », a « follower »
« and yet » : ok if it can introduce an objection
« being » : refers to Cyrus (« you promise many things now that you are in terrible dangers »)
« you will forget » : « but ([face=SPIonic]de\[/face]) they say ([face=SPIonic]fasin[/face]) that you will forget… »
« would you be able » etc. : yes, it is the meaning (Cyrus will not be able to give what he has promised even if he wants to do it)