Exploration of the Mouths of the Indus. Returning to Patala, he found that the citadel had been fortified and that Peithon had arrived with his army, having accomplished everything for which he was despatched. He ordered Hephaestion to prepare what was needful for the fortification of a naval station and the construction of dockyards; for he resolved to leave behind here a fleet of many ships near the city of Patala, where the river Indus divides itself into two streams. He himself sailed down again into the Great Sea by the other mouth of the Indus, to ascertain which branch of the river is easier to navigate. The mouths of the river Indus are about 1800 stades distant from each other.779 In the voyage down he arrived at a large lake in the mouth of the river, which the river makes by spreading itself out; or perhaps the waters of the surrounding district draining into it make it large, so that it very much resembles a gulf of the sea.780 For in it were seen fish like those in the sea, larger indeed than those in our sea. Having moored his ships then in this lake, where the p............