Napoleon was about leaving Schoenbrunn, to return to France, when, October 12, 1809, just as he was about to review his troops, he saw approaching him a young German, of suspicious appearance, who was at once arrested. This young man, whose name was Staaps, was the son of a Protestant pastor at Erfurt, and under his coat was found a large, sharp dagger, with which he said he had intended to kill the Emperor, in order to deliver Germany. The cool, calm replies of this determined fanatic, whom Napoleon himself examined, made a deep impression upon him. Might not this young German be the forerunner of numberless volunteers who were about to organize against France what they would consider a holy war? At the sight of this youth, who gave calm expression to unrelenting hatred, Napoleon--who did not venture to spare his life, although no criminal act had been committed--was moved by a painful feeling in which pity was mingled with surprise. He who had cost Germany such torrents of blood and tears was singularly astonished when at last he saw that Germany did not love him. Nothing is so repugnant to the great of the earth, and especially to conquerors, as the thought of death,--death, the only unconquerable foe! What, the first comer, a fool, a vulgar fanatic, can with a kitchen knife lay low the greatest hero, the most illustrious warrior, the mightiest king! At Regensberg, when he was wounded for the first time since he had begun his military career, the hero of so many battles perceived, and not without a pang, that he was not invulnerable. Before the corpse of the brave Marshal Lannes, who had had his two legs carried off by a cannon-ball at Esoling, he wrote very sadly to the Empress Josephine: "So everything ends!" And now he might himself have fallen by the hand of a poor, unknown student! As the Duchess of Abrantès wrote: "Death, which was always prowling about the Emperor in various forms, yet never daring to seize him, but always appearing to say, Take care! ... was a prophecy, and a prophecy of evil." Napoleon began to reflect seriously. To audacity and the spirit of adventure there suddenly succeeded prudence and the need of self-preservation. The all-powerful Emperor said to himself at the moment of his triumph, that if he were to die without a direct heir, his vast Empire would fall to pieces, like that of Alexander the Great, and the unrivalled edifice, built at the price of so much toil and sacrifice, would be shattered.