It now remained to kill Parmenio, who could not be safely left alive after the atrocities used towards Philotas; and to kill him, moreover, before he could have time to hear of them, since he was not only the oldest, most respected, and most influential of all Macedonian officers, but also in separate command of the great depôt at Ekbatana. Alexander summoned to his presence one of the Companions named Polydamas; a particular friend, comrade, or _aide de camp_, of Parmenio. Every friend of Philotas felt at this moment that his life hung by a thread; so that Polydamas entered the king’s presence in extreme terror, the rather as he was ordered to bring with him his two younger brothers. Alexander addressed him, denouncing Parmenio as a traitor, and intimating that Polydamas would be required to carry a swift and confidential message to Ekbatana, ordering his execution. Polydamas was selected as the attached friend of Parmenio, and therefore as best calculated to deceive him. Two letters were placed in his hands, addressed to Parmenio; one from Alexander himself, conveying ostensibly military communications and orders; the other, signed with the seal-ring of the deceased Philotas, and purporting to be addressed by the son to the father. Together with these, Polydamas received the real and important despatch, addressed by Alexander to Kleander and Menidas, the officers immediately subordinate to Parmenio at Ekbatana; proclaiming Parmenio guilty of high treason, and directing them to kill him at once. Large rewards were offered to Polydamas if he performed this commission with success, while his two brothers were retained as hostages against scruples or compunction. He promised even more than was demanded—too happy to purchase this reprieve from what had seemed impending death. Furnished with native guides and with swift dromedaries, he struck by the straightest road across the desert of Khorasan, and arrived at Ekbatana on the eleventh day—a distance usually requiring more than thirty days to traverse.[471] Entering the camp by night, without the knowledge of Parmenio, he delivered his despatch to Kleander, with whom he concerted measures. On the morrow he was admitted to Parmenio, while walking in his garden with Kleander and the other officers marked out by Alexander’s order as his executioners. Polydamas ran to embrace his old friend, and was heartily welcomed by the unsuspecting veteran, to whom he presented the letters professedly coming from Alexander and Philotas. While Parmenio was absorbed in the perusal, he was suddenly assailed by a mortal stab from the hand and sword of Kleander. Other wounds were heaped upon him as he fell, by the remaining officers,—the last even after life had departed.[472] [471] Strabo, xv. p. 724; Diodor. xvii. 80; Curtius, vii. 2, 11-18.