TWO:Frederick, being constrained by the approach of General Daun to raise the siege of Dresden, retired to his intrenched camp at Schlettau. Leaving fifteen thousand men to guard the camp, he, on the 1st of August, before the dawn, crossed the Elbe, and was again on the rapid march toward Silesia. His army consisted of thirty thousand men, and was accompanied by two thousand heavy baggage-wagons. In five days the king marched over one hundred miles, crossing five rivers. Armies of the allies, amounting504 to one hundred and seventy-five thousand Austrians and Russians, were around himsome in front, some in his rear, some on his flanks.150The correspondence carried on between Frederick and Voltaire, and their mutual comments, very clearly reveal the relations existing between these remarkable men. Frederick was well aware that the eloquent pen of the great dramatist and historian could give him celebrity throughout Europe. Voltaire was keenly alive to the consideration that the friendship of a monarch could secure to him position and opulence. And yet each privately spoke of the other very contemptuously, while in the correspondence which passed between them they professed for each other the highest esteem and affection. Frederick wrote from Berlin as follows to Voltaire:
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