As Helenus was speaking, the thought of his father, Priam, and of his brothers who were still living caused him to burst into tears; his grief was so strong that he lost all control of himself and collapsed. When he had come to his senses and was able to rise, Neoptolemus took him in charge. He had him guarded for fear he might somehow inform the enemy about what had happened. But Helenus, seeing himself under guard, told Neoptolemus there was nothing to worry about, for he would prove faithful and, after Troy’s fall, would live with Neoptolemus in Greece many years.
Dictys of Crete, Journal of the Trojan War