4. The Rhine forcing its way into this pool, and roaring with its foaming eddies, pierces the sluggish quiet of the waters, and rushes through the middle from one end to the other. And like an element separated from some other element by eternal discord, without any increase or diminution of the volume of water which it has brought into the lake, it comes forth from it again with its old name and its unalloyed power, never having suffered from the contact, and so proceeds till it mingles with the waves of the sea. 5. And what is exceedingly strange, the lake is not moved at all by this rapid passage of the river through it, nor is it affected by the muddy soil beneath the waters of the lake; the two bodies of water being incapable of mingling with each other. A thing which would be supposed impossible, did not the very sight of the lake prove the fact. 6. In a similar manner, the Alpheus, rising in Arcadia, being seized with a love for the fountain Arethusa,[37] passing through the Ionian sea, as is related by the poets, proceeds onward till it arrives at the neighbourhood of its beloved fountain. * * * * * 7. Arbetio not choosing to wait till messengers arrived to announce the approach of the barbarians, although he knew the fierce way in which they begin their wars, allowed himself to be betrayed into a hidden ambush, where he stood without the power of moving, being bewildered by the suddenness of his disaster. 8. In the mean time the enemy, showing themselves, sprang forth from their hiding-places and spared not one who came in their way, but overwhelmed them with every kind of weapon. For none of our men could offer the smallest resistance, nor was there any hope of any of them being able to save their lives except by a speedy flight. Therefore, being intent only on avoiding wounds, our soldiers, losing all order, ran almost at random in every direction, exposing their backs to the blows of the enemy. Nevertheless the greater part of them, scattering themselves among narrow paths, were saved from danger by the protecting darkness of the night, and at the return of day recovered their courage and rejoined their different legions. But still by this sad and unexpected disaster a vast number of common soldiers and ten tribunes were slain. 9. The Allemanni were greatly elated at this event, and advanced with increased boldness, every day coming up to the fortifications of the Romans while the morning mists obscured the light; and drawing their swords roamed about in every direction, gnashing their teeth, and threatening us with haughty shouts. Then with a sudden sally our Scutarii would rush forth, and after being stopped for a moment by the resistance of the hostile squadrons, would call out all their comrades to join them in the engagement.