THREE:Grumkow gathered up his papers, and, with his associate officials, departed, probably meditating upon his own prospects should the Crown Prince ever become King of Prussia. The next day, September 5, the captive was taken from the castle of Mittenwalde, and sent to the fortress of Cüstrin, a small and quiet town about seventy miles from Berlin. The strong, dungeon-like room in which he was incarcerated consisted of bare walls, without any furniture, the light being admitted by a single aperture so high that the prince could not look out at it. He was divested of his uniform, of his sword, of every mark of dignity.But Frederick did not seem to think himself at all bound by his treaty obligations with France to refrain from entering into secret arrangements with the foe which would promote his interests, however antagonistic those arrangements might be to his assumed obligations. He was the ally of France in the attempt to wrest territory from the young Queen of Austria, and to weaken her power. His armies and those of France were acting in co-operation. Frederick now proposed to the common enemy that, if Silesia were surrendered to him, he would no longer act in co-operation with his ally; but, that France might not discover his perfidy, he would still pretend to make war. The Austrians were to amuse themselves in defending Neisse from a sham siege until the pleasant weeks of autumn were gone, and then they were to march, with all their guns and ammunition, south to Vienna, there to fight the French. Frederick, still assuming that he was the ally of France, was to avail himself of the excuse that the season of ice and snow was at hand, and withdraw into winter quarters. Such, in general, were the terms which Frederick authorized his minister, Goltz, to propose to Lord Hyndford, as the agent of England and Austria.
