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The Silver Griffin of the Silver Vein, a branch of the Cult of Kosmos, had settled there by the time of the Peloponnesian War, along with guards loyal to the Cult of Kosmos. He sent a letter to the overseer of the Lavrio Silver Mine, requesting him to come to the island, alone. Instead of the overseer, it was the Spartan misthios Kassandra who came, and slew the cultists, including the Silver Griffin, and freed their prisoners and looted their valuables.