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284 Macedonian infantry, together with the chiefs of the Indians dwelling this side of the Hyphasis, who had with them 5,000 men. He gave Craterus orders not to cross the river before Porus moved off with his forces against them, or before he ascertained that Porus was in flight and that they were victorious. " If however," said he, "Porus should take only a part of his army and march against me, and leave the other part with the elephants in his camp, in that case do thou also remain in thy present position. But if he leads all his elephants with him against me, and a part of the rest of his army is left behind in the camp, then do thou cross the river with all speed. For it is the elephants alone," said he, "which render it impossible for the horses to land on the other bank. The rest of the army can easily cross."   Such were the injunctions laid upon Craterus. Between the island and the great camp where Alexander had left this general, he posted Meleager, Attalus, and Gorgias, with the Grecian mercenaries, cavalry and infantry, giving them instructions to cross in detachments, breaking up the army as soon as they saw the Indians already involved in battle. He then picked the select bodyguard called the Companions, as well as the cavalry regiments of Hephaestion, Perdiccas, and Demetrius, the cavalry from Bactria, Sogdiana, and Scythia, and the Daan horse-archers; and from the phalanx of infantry the shield-bearing guards, the brigades of Clitus and Coenus, with the archers and Agrianians, and made a secret march, keeping far away from the bank of the river,