As night drew on the hopelessness of the situation oppressed even the king himself with harassing anxieties. But no care could ever daunt his indomitable spirit, and great as was his anxiety it did not prevent him from remaining all night on the watch and giving out his orders. He even sent some horsemen to the mouth of the river with instructions that when they saw the tide returning they should go before it and announce its approach. Meanwhile he caused the shattered vessels to be repaired, and those that were overturned to be set upright, at the same time ordering the men to be ready and on the alert when the land would be inundated by the return of the tide. The whole of that night had been spent by the king in watching and addressing words of encouragement to his men, when the horsemen came back at full gallop, with the tide following at their heels. It came at first with a gentle current which sufficed to set the ships afloat, but it soon gathered strength enough to set the whole fleet in motion. Then the soldiers and sailors, giving vent to their irrepressible joy at their unexpected deliverance, made the shores and banks resound with their exulting cheers. They asked each other wonderingly wherefrom so vast a sea had suddenly returned, whereto it had retired the day before, what was the nature of this strange element, which at one time was out of harmony with the natural laws of space, but at another was obedient to some fixed laws in respect of time?[324] The king conjecturing from what had happened that the tide would return after sunrise, took advantage of it, and starting at midnight sailed down the river attended by a few ships, and having passed its mouth, advanced into the sea a distance of 400 stadia, and thus at last accomplished the object he had so much at heart. Having then sacrificed to the tutelary gods of the sea and of the places adjacent, he took the way back to his fleet. _Chapter X.—Alexander goes homeward by land, leaving Nearchus to follow by sea and conduct the fleet to the head of the Persian Gulf—Disastrous march through Gedrosia—Alexander arrives in Carmania, where he holds Bacchic revels to celebrate his conquests_