further concealed by a violent storm of rain and thunder which broke during the march. He arrived unperceived at the appointed place, and found the fleet of galleys, boats, and rafts in readiness.
The enemy had no suspicion of what was happening until the fleet appeared in the open river beyond the wooded island, and Alexander disembarked his force at daybreak without opposition. But when he had landed, he was disappointed to find that yet another deep channel lay in front, which must be crossed. With much difficulty a ford was found, and the infantry struggled through, breast-deep in the stream, while the horses swam with only their heads above water. The sole practicable road from the camp of Poros involved a wide detour, which rendered prompt opposition impossible, and Alexander was able to deploy his dripping troops on the mainland before any attempt could be made to stop him.
Then, when it was too late, the son of the Indian king came hurrying up with two thousand horse and 120 chariots. This inadequate force was speedily routed with the loss of four hundred killed and of all the chariots. Fugitives carried the disastrous news to the camp of Poros, who moved out with the bulk of his army to give battle, leaving a guard to protect his baggage against Krateros, who lay in wait on the opposite bank. The Indian army deployed on the only ground available, the plain now known as Karri, girdled on the north and east by low hills, and about five miles in width at its broadest part. The surface was a firm
