Phrynichus knew well what would be the consequence to himself—if this consummation were brought about, as he foresaw that it probably would be—from the vengeance of his enemy Alkibiadês against his recent opposition. Satisfied that the latter would destroy him, he took measures for destroying Alkibiadês beforehand, even by a treasonable communication to the Lacedæmonian admiral Astyochus at Milêtus, to whom he sent a secret account of the intrigues which the Athenian exile was carrying on at Samos to the prejudice of the Peloponnesians, prefaced with an awkward apology for this sacrifice of the interests of his country to the necessity of protecting himself against a personal enemy. But Phrynichus was imperfectly informed of the real character of the Spartan commander, or of his relations with Tissaphernês and Alkibiadês. Not merely was the latter now at Magnesia, under the protection of the satrap, and out of the power of the Lacedæmonians, but Astyochus, a traitor to his duty through the gold of Tissaphernês, went up thither to show the letter of Phrynichus to the very person whom it was intended to expose. Alkibiadês forthwith sent intelligence to the generals and officers at Samos, of the step taken by Phrynichus, and pressed them to put him to death. The life of Phrynichus now hung by a thread, and was probably preserved only by that respect for judicial formalities so deeply rooted in the Athenian character. In the extremity of danger, he resorted to a still more subtle artifice to save himself. He despatched a second letter to Astyochus, complaining of the violation of confidence in regard to the former, but at the same time intimating that he was now willing to betray to the Lacedæmonians the camp and armament at Samos. He invited Astyochus to come and attack the place, which was as yet unfortified, explaining minutely in what manner the attack could be best conducted. And he concluded by saying that this, as well as every other means of defence, must be pardoned to one whose life was in danger from a personal enemy. Foreseeing that Astyochus would betray this letter as he had betrayed the former, Phrynichus waited a proper time, and then revealed to the camp the intention of the enemy to make an attack, as if it had reached him by private information. He insisted on the necessity of immediate precautions, and himself, as general, superintended the work of fortification, which was soon completed. Presently arrived a letter from Alkibiadês, communicating to the army that Phrynichus had betrayed them, and that the Peloponnesians were on the point of making an attack. But this letter, arriving after the precautions taken by order of Phrynichus himself had been already completed, was construed as a mere trick on the part of Alkibiadês himself, through his acquaintance with the intentions of the Peloponnesians, to raise a charge of treasonable correspondence against his personal enemy.