It so happened, too, that something else occurred contributing to this campaign. There was among Amasis' mercenaries a man who was a Halicarnassian by birth, a clever man and a good soldier, whose name was Phanes. This Phanes had some grudge against Amasis, and fled from Egypt aboard ship, hoping to talk to Cambyses. Since he was a man much admired among the mercenaries and had an exact knowledge of all Egyptian matters, Amasis was anxious to catch him, and sent a trireme with his most trusted eunuch to pursue him. This eunuch caught him in Lycia but never brought him back to Egypt , for Phanes was too clever for him. He made his guards drunk and so escaped to Persia . There he found Cambyses prepared to set out against Egypt , but in doubt as to his march, how he should cross the waterless desert; so Phanes showed him what was Amasis' condition and how he should march; as to this, he advised Cambyses to send and ask the king of the Arabians for a safe passage.