The hansom drove off, and Wolfenden stood on the pavement, hat in hand. What fortune! He could scarcely believe in it. Then, just as he turned to move on, something lying at his feet almost at the edge of the kerbstone attracted his attention. He looked at it more closely. It was a ribbon--a little delicate strip of deep blue ribbon. He knew quite well whence it must have come. It had fallen from her gown as she had stepped into the hansom. He looked up and down the street. It was full, but he saw no one whom he knew. The thing could be done in a minute. He stooped quickly down and picked it up crushing it in his gloved hand, and walking on at once with heightened colour and a general sense of having made a fool of himself. For a moment or two he was especially careful to look neither to the right or to the left; then a sense that some one from the other side of the road was watching him drew his eyes in that direction. A young man was standing upon the edge of the pavement, a peculiar smile parting his lips and a cigarette between his fingers. For a moment Wolfenden was furiously angry; then the eyes of the two men met across the street, and Wolfenden forgot his anger. He recognised him at once, notwithstanding his appearance in an afternoon toilette as carefully chosen as his own. It was Felix, Mr. Sabin's assailant. CHAPTER IX THE SHADOWS THAT GO BEFORE Wolfenden forgot his anger at once. He hesitated for a moment, then he crossed the street and stood side by side with Felix upon the pavement. "I am glad to see that you are looking a sane man again," Wolfenden said, after they had exchanged the usual greetings. "You might have been in a much more uncomfortable place, after your last night's escapade." Felix shrugged his shoulders. "I think," he said, "that if I had succeeded a little discomfort would only have amused me. It is not pleasant to fail." Wolfenden stood squarely upon his feet, and laid his hand lightly upon the other's shoulder. "Look here," he said, "it won't do for you to go following a man about London like this, watching for an opportunity to murder him. I don't like interfering in other people's business, but willingly or unwillingly I seem to have got mixed up in this, and I have a word or two to say about it. Unless you give me your promise, upon your honour, to make no further attempt upon that man's life, I shall go to the police, tell them what I know, and have you watched." "You shall have," Felix said quietly, "my promise. A greater power than the threat of your English police has tied my hands; for the present I have abandoned my purpose." "I am bound to believe you," Wolfenden said, "and you look as though you were speaking the truth; yet you must forgive my asking why, in that case, you are following the man about? You must have a motive." Felix shook his head.