Previously in Herodotus
118. Let us now leave Homer and the Trojan Epic; but this I will say, namely that I asked the priests whether it is but an idle tale which the Greeks tell of that which they say happened about Troy; and they answered me thus, saying that they had their knowledge by inquiries from Menelaos himself. After the rape of Helen there came indeed, they said, to the Trojan land a large army of Greeks to help Menelaos; and when the army had come out of the ships to land and had pitched its camp there, they sent messengers to Troy, with whom went also Menelaos himself; and when these entered within the wall they demanded back Helen and the wealth which Paris had stolen from Menelaos and had taken away; and moreover they demanded satisfaction for the wrongs done: and the Trojans told the same tale then and afterwards, both with oath and without oath, namely that in deed and in truth they had not Helen nor the wealth for which demand was made, but that both were in Egypt; and that they could not justly be compelled to give satisfaction for that which Proteus the Pharoah of Egypt had. The Greeks however thought that they were being mocked by them and besieged the city, until at last they took it; and when they had taken the wall and did not find Helen, but heard the same tale as before, then they believed the former tale and sent Menelaos himself to Proteus.
- Herodotus, Book II
More Information: Egypt, Herodotus's Book.