When the Archduke Charles learned the general situation of his enemy he determined to do exactly this thing--that is, to attack and overwhelm each portion of the French army separately. For this purpose he crossed the Isar, and, turning to the right, marched directly on Ratisbon to attack Davout's command with his superior force before Massena's scattered divisions could reach the positions assigned to them. But he was too late. The semaphore telegraph then in use had flashed from station to station its signals of the declaration of war and of the enemy's advance over the Inn, until the news reached Napoleon in Paris on the twelfth. On the sixteenth, after four days' almost unbroken travel, he reached Donauwoerth. The confusion into which Berthier's orders had thrown his carefully arranged plans infuriated him; but when he heard, as he descended from his traveling-carriage, where the enemy was, he could not believe his ears. When assured of the truth he seemed, as eye-witnesses declared, to grow taller, his eyes began to sparkle, and with every indication of delight he cried: "Then I have him! That's a lost army! In one month we are in Vienna!" The enemy's first decisive blunder was the march by Linz; the second was yet to be made. Napoleon's strategy during the following days was, both in his own opinion and in that of his military commentators, the greatest of his life. Such had been Berthier's indecision when he saw his blunder that one general at least--to wit, Pelet--charged him with being a traitor. In twenty-four hours his puzzled humor and conflicting orders had more or less demoralized the whole army. But Napoleon's presence inspired every one with new vigor, from the division commanders to the men in the ranks. Promptly on the seventeenth the order went forth for Davout to leave Ratisbon and challenge the enemy to battle by a flank march up the right bank of the Danube to Ingolstadt in his very face. Lefebvre was to cover the movement, and Wrede, with one Bavarian division, was held ready to strengthen any weak spot in case of battle. Next day Massena was ordered to set out from Augsburg for the same point, "to unite with the army, catch the enemy at work, and destroy his columns." To this end he was to march eastward by Pfaffenhofen. In a twinkling the scattered French army seemed already concentrated, while scouts came one after the other to announce that the Austrians were separating.