And then Murk jerked down the receiver hook, and grinned as he put the receiver on it. Kate Gilbert would believe that a careless central girl had cut them off and put an end to the conversation. He had learned what he had wished to learn--that Kate Gilbert was at home. He walked back up the street. All he had to do now was to watch, and if Kate Gilbert left the place follow her. If she did not, Murk would wait half an hour or so after the lights in the apartment were turned out, to be sure that she had retired, and then would hurry back to the hotel. Murk watched from a distance at first, and then went slowly forward, for he did not wish to attract attention by remaining in one position too long. There were few persons on the block; and now and then some automobile or taxicab would discharge a passenger and go on. Murk made his way slowly to the end of the block, always watching the entrance of the apartment house, crossed the street, and started back on the other side. He came in front of a dark passageway between two buildings, and went on. And out of the mouth of that dark passageway came a blow that caused Murk to groan once and topple forward. Hands gripped his unconscious body and drew him back into the darkness. CHAPTER XVII MURK IS TEMPTED The next thing that impressed itself upon Murk's consciousness was the fact that he had a terrific pain in the back of his head. Many times during his career Murk had experienced similar pains. And he knew that the best thing to do was to remain quiet for a short time, keep his eyes closed, and gradually pull himself together. So he pretended that he had not regained consciousness. He knew that he had been stretched upon a bed or couch of some sort, and that his wrists were lashed together, and his ankles. He was not gagged, however. Gradually the pain ceased, Murk's senses cleared and he became aware of what was going on around him. He could hear whispered voices, but could not distinguish words and sentences; neither could he tell whether the voices were those of men or women. Finally Murk opened his eyes. He found that he was in a small room furnished in quite an ordinary manner. He was stretched on an old-fashioned sofa. There were a few chairs scattered about, and a cupboard in one corner. In the middle of the room was an ordinary table covered with a red cloth. Upon the table a kerosene lamp was burning. Murk groaned and made an attempt to sit up, but fell back again because of a fit of dizziness. It became evident that his groan had been heard in the room adjoining, for the door, which had been ajar, now was thrown open wide, and two men entered. Murk knew them instantly; they were the men who had attacked Sidney Prale in the Park. "Back to earth, are you?" one of them snarled. "If I had my way, you'd have been cracked on the head for good." Murk snarled in reply, despite the fact that he was bound and at the mercy of these men.