Brenda was astonished at the extent of the man's knowledge and the dogged fierceness with which he seemed to follow her and Harold. She wondered if it would not be wise to have so dangerous an enemy arrested at once. But the thought of Lady Jenny and the shame which it would bring upon her through the deeds of her late husband--which Van Zwieten would assuredly reveal in such a contingency--prevented her from deciding upon so severe a course. Later on she had reason bitterly to regret that she had not acted upon her first impulse. Had she done so it would have saved both her husband and herself endless trouble. Van Zwieten half guessed what was in her mind, but he made no move, and seemed quite content to abide by her decision. There was even a smile on his face as he looked at her. Villain as he was, his courage was undeniable. The pity was that such a virtue should not have been linked to others. But then that was the man all over. He was a belated Conrad the Corsair. "A man of one virtue and ten thousand crimes." Yet another virtue might be added. He loved Brenda, and he loved her honestly. "I see you know your business as a spy, Mr. van Zwieten," she said coldly. "But all your work is thrown away. If you succeeded in killing my husband, as you seem anxious to do, I should kill myself!" Van Zwieten turned a shade paler. For once he was moved out of his attitude of sneering insolence. "No, no," he said hoarsely, "do not think of such a thing! I won't harm your husband, on my honor----" "Your honor! The honor of a spy?" "The honor of a man who loves you!" he said with some dignity. She shrugged her shoulders. She had not much belief in a love which was so selfish in its aims and so unscrupulous in the carrying out of them. But she would not argue further with him, she thought. The conversation was taking a turn of a personal character highly repugnant to her, and she moved away. "Well, Mr. van Zwieten, I have warned you! If you don't leave British territory I shall inform the authorities of your London career. Good-bye!" "Good-bye," he said. He took off his hat with a grand bow as she left him. Nor did he make any attempt to stay her; he knew already that she was going to the front with her husband, and he had every intention of following. That she would reveal his true character he did not for one moment believe. There he had her in his power, for he would at once make known Gilbert Malet's conduct, and that would mean shame and trouble for Lady Jenny, from which Brenda was more than anxious to shield her, as he well knew. She had been a good friend to the girl, and had indirectly done a great deal to bring about the marriage. This Dutchman had more knowledge of a woman's nature than most of his sex, and he found it of no little service in the profession which he had taken up.