Plutarch, Cato the Younger
Bernadotte Perrin, Ed.

63. At this juncture Rubrius came up, wrathfully denouncing the three hundred for great disorder and tumult, inasmuch as they were falling away and throwing the city into confusion. Thereupon the other Romans altogether despaired of their case and burst into tears and lamentations; but Cato tried to encourage them, and sent to the three hundred bidding them await his coming. And now the spokesmen of the horsemen came with immoderate demands. [2] They said they neither wanted Juba for a paymaster, nor feared Caesar if Cato were their leader, but that to be shut up with the people of Utica, a fickle Phoenician folk, was a fearful thing; for even though they were quiet now, whenever Caesar came up against them they would play the traitor and aid him in his attacks. [3] If, therefore, any one wanted their aid in war and their presence, he must first drive out or destroy all the people of Utica, and then invite the horsemen into a city that was free from Barbarians and enemies. This proposal Cato regarded as excessively barbarous and cruel, but he returned a mild answer, saying that he would advise with the three hundred.

[4] So he went back into the city, where he found the men no longer manufacturing pretexts or evasions out of regard for him, but downright angry that any one should try to force them to war with Caesar when they were neither able nor willing. And some of them actually muttered that the men of senatorial rank ought to be detained in the city while Caesar was approaching. [5] But this Cato let pass, as though he had not heard it (and indeed he was somewhat deaf); when, however, men came to him with tidings that the horsemen were going away, he was afraid that the three hundred might become altogether desperate in their hostility to the senators, and therefore rose up and set out on foot with his friends; and when he perceived that the horsemen had already gone on, he took a horse and hastened after them. [6] The horsemen were glad when they saw him riding up, and greeted him, and exhorted him to save himself with them. Then, it is said, Cato actually burst into tears as he begged with outstretched hands in behalf of the senators, even trying to turn back the horses of some of the horsemen and laying hold of their arms, until he prevailed upon them to remain there that day at least, and to make the flight of the senators safe.