182 HTS10RY OF GREECE. having notice of tie project, deposited their movable property for safety in the hand of their neighbors the Bithynian Thra cians ; a remarkable evidence of the good feeling and confidence between the two, contrasting strongly with the perpetual hostility which subsisted on the other side of the Bosphorus between Byzantium and the Thracian tribes adjoining. 1 But the precau- tion was frustrated by Alkibiades, who entered the territory of the Bithynians and compelled them by threats to deliver up the effects confided to them. He then proceeded to block up Chal- kedon by a wooden wall carried across from the Bosphorus to the Propontis ; though the continuity of this wall was interrupted by a river, and seemingly by some rough ground on the imme- diate brink of the river. The blockading wall was already com- pleted, when Pharnabazus appeared with an army for the relief of the place, and advanced as far as the Herakleion, or temple of Herakles, belonging to the Chalkedonians. Profiting by his approach, Hippokrates, the Lacedasmonian harmost in the town, made a vigorous sally : but the Athenians repelled all the efforts of Pharnabazus to force a passage through their lines and join him j so that, after an obstinate contest, the sallying force was driven back within the walls of the town, and Hippokrates himself killed.a The blockade of the town was now made so sure, that Alkibi- ades departed with a portion of the army to levy money and get together forces for the siege of Byzantium afterwards. During his absence, Theramenes and Thrasybulus came to terms with Pharnabazus for the capitulation of Chalkedon. It was agreed that the town should again become a tributary dependency of Athens, on the same rate of tribute as before the revolt, and that the arrears during the subsequent period should be paid up. Moreover, Pharnabazus himself engaged to pay to the Athenians twenty talents on behalf of the town, and also to escort some Athenian envoys up to Susa, enabling them to submit proposi- tions for accommodation to the Great King. Until those envoys should return, the Athenians covenanted to abstain from hostili' ties against the satrapy of Pharnabazus. 3 Oaths to this effect 1 Polyb. iv. 44-45. * Xcnoph. Hellen. i, 3, 5-7; Diodor. xiii, 66.
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