Appian of Alexandria Civil Wars 2.12.84

[84] Cleopatra, who had previously reigned with her brother, had been lately expelled from Egypt and was collecting an army in Syria. Ptolemy, her brother, was at Mount Casius in Egypt, ¹ lying in wait for her invasion, and, as Providence would have it, the wind carried Pompey thither. Seeing a large army on the shore he stopped his ship, judging that the king was there, which was the fact. So he sent messengers to tell of his arrival and to speak of his father’s friendship. The king was then about thirteen years of age and was under the tutelage of Achillas, who commanded his army, and the eunuch Pothinus, who had charge of his treasury. These took counsel together concerning Pompey. There was present also Theodotus, a rhetorician of Samos, the boy’s tutor, who offered the infamous advice that they should lay a trap for Pompey and kill him in order to curry favor with Caesar. ² His opinion prevailed. So they sent a miserable skiff to bring him, pretending that the sea was shallow and not adapted to large ships. Some of the king’s attendants came in the skiff, among them a Roman, named Sempronius, ³ who was then serving in the king’s army and had formerly served under Pompey himself. He gave his hand to Pompey in the king’s name and directed him to take passage in the boat to the young man as to a friend. At the same time the whole army was marshalled along the shore as if to do honor to Pompey, and the king was plainly seen in the midst of them wearing a purple robe.