Lucian of Samosata Toxaris vel amicitia 27

[27] I have still one friend to produce, and I think none is more worthy of remembrance than Demetrius of Sunium. He and Antiphilus of the deme of Alopece had been playmates in their childhood, and grown up side by side. They subsequently took ship for Egypt, and carried on their studies there together, Demetrius practising the Cynic philosophy under the famous sophist of Rhodes, while Antiphilus, it seems, was to be a doctor. Well, on one occasion Demetrius had gone up country to see the Pyramids, and the statue of Memnon. He had heard it said that the Pyramids in spite of their great height cast no shadow, and that a sound proceeded from the statue at sunrise: all this he wished to see and hear for himself, and he had now been away up the Nile six months, having left behind Antiphilus (not liking the idea of the heat and the long journey).

[27] We have the fifth case still to consider, and I should not like to name another man and pass over Demetrios of Sounion. This Demetrios sailed to Egypt in company with Antiphilos of Alopeke. They were friends from childhood, being of the same age, and they lived together as students in Egypt, Demetrios pursuing the Cynic system under that famous sophist from Rhodes, and Antiphilos studying medicine. It came to pass after a while that Demetrios went into the interior to see the Pyramids and the Memnon, for he had heard of the Pyramids that, in spite of their height, they throw no shadow, and of the Memnon that it cries out at the rising of the sun. Being desirous, then, of seeing the Pyramids and hearing the Memnon, he sailed up the Nile, leaving Antiphilos, who dreaded the journey and the heat, behind. When Demetrios had been gone six months,