The flank of the Prussian position was turned: the French army passed entirely round them; Napoleon seized Naumburg, and blew up the magazines there,--announcing, for the first time, by this explosion, to the King of Prussia and his Generalissimo, the Duke of Brunswick, that he was in their rear.
From this moment the Prussians were isolated, and cut off from all their resources, as completely as the army of Mack was at Ulm, when the French had passed the Danube and overrun Suabia.

The Duke of Brunswick hastily endeavoured to concentrate his forces for the purpose of cutting his way back again to the frontier which he had so rashly abandoned.

Napoleon, meantime, had posted his divisions so as to watch the chief passages of the Saale, and expected, in confidence, the assault of his outwitted opponent.

It was now that he found leisure to answer the manifesto of Frederick William, which had reached Paris a day or two after he himself quitted that capital for the camp.

His letter, dated at Gera, is written in the most elaborate style of insult.