When word of this came to Guenever she grew heavy at heart, for she hated the traitor to her soul's depth. But she was in his power, and was forced to hide her secret hate. She therefore seemed to consent to his will, and desired permission to go to London, where she might buy all things that were necessary for the wedding. She spoke so fairly that he trusted her, and gave her leave to make the journey. But no sooner had she reached London than she took possession of the Tower, and with all haste supplied it with provisions and garrisoned it with men, and so held it as a fortress, many knights holding with her against the usurper. Mordred soon learned that he had been beguiled by the queen, and, moved to fury, he hastened to London, where he besieged the Tower, assailing it vigorously with great engines of war. But Guenever held out stoutly against him, and neither by fair speech nor foul could he induce her to trust herself into his hands again. [Illustration: THE TOWER OF LONDON.] There now came to Mordred the bishop of Canterbury, who said,-- "Sir, what would you do? Would you displease God and shame knighthood by wedding the wife of your uncle, who has been to you as a father? Cease this vile purpose, I command you, or I shall curse you with book, and bell, and candle, and bring upon your head the vengeance of the church." "Do your worst, sir priest," said Mordred, angrily. "I defy you." "I shall do what I ought; be sure of that. You noise about that the lord Arthur is slain, no word of which I believe. You seek with a lie to make mischief in this land. Beware, lest your vile work recoil upon yourself." "Peace, thou false priest," cried Mordred. "Chafe me no more, or I shall order that thy head be stricken off." Finding that words were useless, the bishop departed, and, as he had threatened, laid the curse of the church on Mordred. Roused to rage by this, the usurper sought him to slay him, and he fled in all haste to Glastonbury, where he took refuge as a hermit in a chapel. But well he knew that war was at hand, and that the rightful king would soon strike for the throne. Despite the anathema of the church, Mordred continued his efforts to get Guenever into his power; but she held firmly to the Tower, repelling all his assaults, and declaring openly that she would rather kill herself than marry such a wretch. Soon afterwards he was forced to raise the siege, for word came to him by secret messengers that Arthur had heard of his treason, and was coming home with his whole host to revenge himself on the usurper of his crown.