On the third day they observed that the sea, coming up with a tide as yet gentle, began to mingle its brine with the fresh water of the river. Then they rowed out to another island that lay in the middle of the river, making, however, slower progress in rowing since the stream of the river was now beaten back by the force of the tide. They put in to the shore of the island, and such as landed ran hither and thither in quest of provisions, never dreaming of the mishap which was to overtake them from their ignorance of tides. It was now about the third hour of the day when the ocean, undergoing its periodic change, rose in flood-tide, and began to burst upon them and force back the current of the river, which being at first retarded, and then more violently repelled, was driven upward contrary to its natural direction with more than the impetuosity of rivers in flood rushing down precipitous beds. The men in general were ignorant of the nature of the sea, and so, when they saw it continually swelling higher, and overflowing the beach which before was dry, they looked upon this as something supernatural by which the gods signified their wrath against their rash presumption. When the vessels were now fairly floated, and the whole squadron scattered in different directions, the men who had gone on shore ran back in consternation to the ships, confounded beyond measure by a calamity of a nature so unexpected. But amid the tumult their haste served only to mar their speed. Some were to be seen pushing the vessels with poles; others had taken their seats to row, but in doing so had meanwhile been preventing the proper adjustment of the oars. Others again, in hastening to sail out into the clear channel, without waiting for the requisite number of sailors and pilots, worked the vessels to little effect, crippled as these were and otherwise difficult to handle. At the same time several other vessels drifted away with the stream before those who were pell-mell crowding into them could all get on board, and in this case the crowding caused as much delay in hurrying off as did the scarcity of hands in the other vessels. From one side were shouted orders to stay, from another to put off, so that amid this confusion of contradictory orders nothing that was of any service could be seen or even heard. In such an emergency the pilots themselves were useless, since their commands could neither be heard for the uproar, nor executed by men so distracted with terror.