Xanthippus, who had contributed so much to this happy change, had the wisdom to withdraw shortly after, from the apprehension lest his glory, which had hitherto been unsullied, might, after this first blaze, insensibly fade away, and leave him exposed to the darts of envy and calumny, which are always dangerous, but most in a foreign country, when a man stands alone, unsustained by friends and relations, and destitute of all support. Polybius tells us, that Xanthippus’s departure was related in a different manner, and promises to take notice of it in another place: but that part of his history has not come down to us. We read in Appian,(677) that the Carthaginians, excited by a mean and detestable jealousy of Xanthippus’s glory, and unable to bear the thoughts that they should stand indebted to Sparta for their safety; upon pretence of conducting him and his attendants back with honour to his own country, with a numerous convoy of ships, gave private orders to have them all put to death in their passage; as if with him they could have buried in the waves for ever the memory of his services, and their horrid ingratitude to him.(678) “This battle,” says Polybius,(679) “though not so considerable as many others, may yet furnish very salutary instructions; which,” adds that author, “is the greatest benefit that can be reaped from the study of history.” First, ought any man to put a great confidence in his good fortune, after he has considered the fate of Regulus? That general, insolent with victory, inexorable to the conquered, scarcely deigning to listen to them, saw himself a few days after vanquished by them, and made their prisoner. Hannibal suggested the same reflection to Scipio, when he exhorted him not to be dazzled with the success of his arms. Regulus, said he, would have been recorded as one of the most uncommon instances of valour and felicity, had he, after the victory obtained in this very country, granted our fathers the peace which they sued for. But putting no bounds to his ambition and the insolence of success, the greater his prosperity, the more ignominious was his fall.(680) In the second place, the truth of the saying of Euripides is here seen in its full extent, “That one wise head is worth a great many hands.”(681) A single man here changes the whole face of affairs. On one hand, he defeats troops which were thought invincible; on the other, he revives the courage of a city and an army, whom he had found in consternation and despair. Such, as Polybius observes, is the use which ought to be made of the study of history. For there being two ways of acquiring improvement and instruction, first by one’s own experience, and secondly by that of other men; it is much more wise and useful to improve by other men’s miscarriages than by our own. I return to Regulus, that I may here finish what relates to him; Polybius, to our great disappointment, taking no further notice of that general.(682)