(Σισίνης), a Persian, who, according to Curtius (3.4), was sent on an embassy to Philip of Macedon by the satrap of Egypt, and was induced to remain in the Macedonian service. He accompanied Alexander the Great on his expedition into Asia; and, while the army was in Cilicia, in B. C. 333, he received a letter from Nabarzanes, a Persian officer, urging upon him the assassination of Alexander. The letter, however, had previously fallen into the king's hands, who had re-sealed it, and caused it to be delivered to Sisines, with the view of testing his fidelity. Sisines intended to acquaint Alexander with its contents, but several days elapsed without his finding an opportunity of doing so, and Alexander, therefore, feeling sure of his treachery, ordered him to be put to death.
The name Sisines appears to be only another form of Asisines. (See Arr. Anab. 1.25.)
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