Plutarch Sertorius 5

[1] And when Marius sailed home from Libya ¹ and was proposing to serve under Cinna as a private citizen under a consul, the rest thought that his offer should be accepted, but Sertorius declared against it, either because he thought that Cinna would pay less attention to him when a man of greater military experience was at hand, or because he was afraid of the harshness of Marius, and feared that he would throw everything into confusion by a passion which knew no limits, and exceed the bounds of justice in the hour of victory.

[2] Accordingly, he said that little remained for them to do, now that they were already victorious, and that if they received Marius he would appropriate to himself all the glory and the power, since he found it hard to share authority and was not to be trusted. Cinna replied that these considerations of Sertorius were sound, but that for his part he had perplexing scruples about rejecting Marius after having himself invited him to join their cause.

[3] To this Sertorius answered: Indeed, I for my part thought that Marius was come of his own accord into Italy, and so I was trying to discover what was advantageous in the matter; but in thy case it was not well to deliberate at all after the arrival of one whom thou thyself didst ask to come; nay, thou shouldst have received and employed him, since a pledge leaves room for no discussion. So Cinna sent for Marius, the army was divided into three parts, and the three men held command.

[4]
  When the war had been brought to an end, ² Cinna and Marius were filled with insolence and all bitterness, and made the evils of war appear as gold to the Romans; Sertorius alone, as we are told, neither killed any one to gratify his anger, nor waxed insolent with victory, but actually rebuked Marius, and by private interviews and entreaties made Cinna more moderate.

[5] And finally, there were the slaves whom Marius had used as allies during the war and as body-guards of his tyranny. They had thus become powerful and rich, partly by the permission and under the orders of Marius, and partly through their lawless and violent treatment of their masters, whom they would slay, and then lie with their masters’ wives, and outrage their masters’ children. Such a state of things Sertorius felt to be unendurable, and therefore when the slaves were all encamped together he had them shot down with javelins, and they were as many as four thousand in number. ³