Alexander advanced from one conquest like this to another, moving toward the northward and eastward after he had crossed the mountains, until at length he approached the mouths of the Danube. Here one of the great chieftains of the barbarian tribes had taken up his position, with his family and court, and a principal part of his army, upon an island called Peucé, which may be seen upon the map at the beginning of this chapter. This island divided the current of the stream, and Alexander, in attempting to attack it, found that it would be best to endeavor to effect a landing upon the upper point of it.