When Stilicho seemed to abandon his sovereign in the unguarded palace of Milan, he had probably calculated the term of his absence, the distance of the enemy, and the obstacles that might retard their march. He principally depended on the rivers of Italy, the Adige, the Mincius, the Oglio, and the Addua, which, in the winter or spring, by the fall of rains, or by the melting of the snows, are commonly swelled into broad and impetuous torrents. 37 But the season happened to be remarkably dry: and the Goths could traverse, without impediment, the wide and stony beds, whose centre was faintly marked by the course of a shallow stream. The bridge and passage of the Addua were secured by a strong detachment of the Gothic army; and as Alaric approached the walls, or rather the suburbs, of Milan, he enjoyed the proud satisfaction of seeing the emperor of the Romans fly before him. Honorius, accompanied by a feeble train of statesmen and eunuchs, hastily retreated towards the Alps, with a design of securing his person in the city of Arles, which had often been the royal residence of his predecessors. 3711 But Honorius 38 had scarcely passed the Po, before he was overtaken by the speed of the Gothic cavalry; 39 since the urgency of the danger compelled him to seek a temporary shelter within the fortifications of Asta, a town of Liguria or Piemont, situate on the banks of the Tanarus. 40 The siege of an obscure place, which contained so rich a prize, and seemed incapable of a long resistance, was instantly formed, and indefatigably pressed, by the king of the Goths; and the bold declaration, which the emperor might afterwards make, that his breast had never been susceptible of fear, did not probably obtain much credit, even in his own court. 41 In the last, and almost hopeless extremity, after the Barbarians had already proposed the indignity of a capitulation, the Imperial captive was suddenly relieved by the fame, the approach, and at length the presence, of the hero, whom he had so long expected. At the head of a chosen and intrepid vanguard, Stilicho swam the stream of the Addua, to gain the time which he must have lost in the attack of the bridge; the passage of the Po was an enterprise of much less hazard and difficulty; and the successful action, in which he cut his way through the Gothic camp under the walls of Asta, revived the hopes, and vindicated the honor, of Rome. Instead of grasping the fruit of his victory, the Barbarian was gradually invested, on every side, by the troops of the West, who successively issued through all the passes of the Alps; his quarters were straitened; his convoys were intercepted; and the vigilance of the Romans prepared to form a chain of