"But," looking at the detective shyly, "I may meet Cora; she may throw her grappling-hooks on me again, and I may put her wise about you and what you know." "I'll trust you," said Nick, with a smile. "Sure you are not afraid I may fall down?" "Not in the least, Slack. Good-by." Nick limped out of the building, and half an hour later was in his room on Jefferson Avenue. Chick, to his satisfaction, was there to meet him. His face shone with excitement and pleasure. "Great news, Nick," he said. "I've located Leonard." "Where is he?" Nick's face was now as bright as Chick's. "In a big brick building used as a private sanatorium, beyond the southern limits of the city." "Doctor Holcomb runs this sanatorium, doesn't he?" "Yes," regarding the great detective in astonishment. "How did you know?" "I obtained a list of Leonard's friends to-day, and among them, as the closest and most intimate of all, is the name of Doctor Holcomb. He was a mining partner of Leonard in California many years ago. I have been anxious to see you, Chick, so that I might put you on, but you have already done the trick. You are a wonder, Chick." The young detective blushed with pleasure. "The building is set in the middle of spacious grounds, and is well guarded. Its appearance excited my curiosity, and I made a few cautious inquiries before venturing near the main gate. I was made up as a hobo, as you know, and I was giving the guard outside the gate a fill about experiences on the road, when a closed carriage drove up and two men alighted. One I took to be Doctor Holcomb; the other, from your description, I identified as Gabriel Leonard. They did not notice me, and I slipped out of sight while the guard was opening the gate." "I wonder where Leonard and the doctor had been?" said Nick thoughtfully. "Perhaps Leonard had been hiding out of the city, and had got a note to his friend, the doctor, and the doctor went to bring him to safer quarters." "That's it, Nick, I'll bet." "Is this sanatorium near the river?" "Yes; the grounds extend to the levee. And now, what's the program? Shall we notify the chief, get a force of men, go out there, surround the place, and catch our man?" "No. Such a move might spoil all. Leonard at bay might commit suicide. I want his confession. And I want something else. I have in mind a plan which, I think, will bring us victory. About this outside man at the sanatorium, is he an American?" "No, a Swede, with long, fair hair, and whiskers to match." "Are his duties confined to the outside?" "It's turn about with the attendants. I learned this when I struck the Swede for a dime. He refused, and told me to tackle the man whose turn for outside duty would come to-morrow." "'I tank he ban easy,' he said." "Then the Swede is not easy. Therefore, he cares for money. But how to reach him? We don't even know his name." "I know it," said Chick. "Doctor Holcomb called him Detson."