'"Why are you so cross to-night?" I asked, at length; "I don't know what to make of you!"'

'"Look at the queen," she replied, "and you will be answered." I turned and looked, and grew cold and white at the sight of her, standing rigid in a corner of the ball-room between two of her ladies. In a moment more she bent her head and said good-night to her guests, then walked to her carriage, making a sign to me to follow her. Not a word did we utter all the way to the palace; I thought my brother must be dead, and in this terrible silence and uncertainty my heart began to palpitate so furiously that I felt as if I should be suffocated.'

For some time her ladies, under the queen's orders, refused to tell Wilhelmine what had happened, but seeing the poor girl was firmly convinced of the prince's death, madame von Sonsfeld informed her that letters had arrived from the king, stating that the crown prince had been arrested, as he was attempting to escape. Next day they learned that Katte also had been taken prisoner, but Keith cleverly managed to place himself under the protection of the English ambassador to the Hague, lord Chesterfield, and to pass over to England in his suite. When the shock of the news was passed, the first thought of both the queen and Wilhelmine was for the numerous letters they had written to the prince, in which they had said many bitter and imprudent things about the king's behaviour. Wilhelmine hoped they had been burned, as she had always bidden Fritz to do the moment he received them; but the queen feared that they might have been entrusted to Katte (as he was known to have in his care many of the prince's possessions), and in this case they must be got from him at all cost, or the crown prince's head would certainly pay forfeit. The queen was right: the letters were among Katte's papers, with the official seal placed upon them.

In this desperate plight, Sophia Dorothea threw herself upon the generosity of marshal Natzmar, Katte's superior. No direct answer was received, and the queen and Wilhelmine were almost ill with anxiety, when, one day, when the princess was alone with madame von Sonsfeld, the countess von Fink entered bearing a heavy portfolio.

'It is most mysterious,' said she, sinking into a chair with her burden; 'when I went into my room last night I found this great portfolio, with a chain and seals round it, addressed to the queen, and this note for you, madame. As I did not like to disturb her Majesty I have brought them to you.'

Wilhelmine's heart beat with excitement, but she dared not betray herself. She took the note quietly, and read its contents, which were very short. 'Have the goodness, madame, to deliver this portfolio to the queen. It contains the letters which she and the princess have written to the crown prince.'

Carrying the portfolio, and grumbling all the while as to the unknown risks she might be running, countess von Fink followed Wilhelmine and madame von Sonsfeld into the presence of the queen, whose joy was boundless on receiving the precious letters. But in a few minutes her face clouded over again, as she perceived that many difficulties still lay before her. First, there were the spies by whom the king had surrounded them; they would at once detect the absence of so large an object. Then there was the danger that Katte would mention the letters in the cross-examination he would have to undergo, and once their existence was known, and madame von Fink questioned, the prince's cause was lost, and his mother and sister might have to undergo imprisonment for life. What could be done? All day long plan after plan was thought of and rejected, but at length it was Wilhelmine who hit upon one that might do. The portfolio was openly to lie in the queen's apartments as if it had been brought to her for safe custody, and then, with great precautions, the seal could be raised without breaking it, and the chain filed through where it could easily be joined again. Then the letters could be taken out, and others, quite harmless, written and put back in their place. Clever though it all sounded, it would have been impossible to carry out the scheme had it not been for a most lucky accident which had befallen the queen's confidential valet Bock, who was called in to raise the seal. On examining the coat-of-arms on the wax he recognised it as the same engraved on a seal he had picked up four weeks earlier in the garden at Montbijou, and which, he now discovered, belonged to Katte. By this means the wax could be broken and re-sealed without the slightest risk.

The letters were now in the hands of the queen and princess, and were to the full as dangerous as they had expected to find them; but there was no time to spare for lamenting their folly if they were to have others ready to await the king on his return. Of course, there was no need to replace the whole fifteen hundred; but a great deal had to be done, and without delay Wilhelmine and her mother sat down to write a large number, taking care to obtain paper with the proper water-mark of every year. In three days they had seven hundred ready, and in order to give the impression that they wished to conceal the letters, the queen filled up the portfolio with handkerchiefs and various articles of fine linen.

All was now ready for the arrival of the king, and when the day and hour was fixed the queen awaited him in her apartments. As soon as he reached the threshold, he shouted out: 'Well, Madame, your wretched son is dead.'

'Dead!' repeated the queen, clutching at a chair as she spoke. 'Dead! you have had the heart to kill him?'