"She had the gems," he muttered. "Perhaps she had an idea of selling them quick to raise money to aid her parents, both of whom she now knows are in trouble. She's a wise girl, and must certainly know that she would be helpless to aid them without money. Money will give her power. It's possible, therefore, that she's heading for the jewelry district, which is near by. As the street is crowded with vehicles and she'd have to cross to reach Maiden Lane or John street, she must have gone over under the protection of a policeman. He would remember her and might post me. I'll try all the big cops from here down to Wall street, if necessary." Harry knew that the largest part of the time of these officers was spent at escorting people across the crowded street. He therefore began with the policeman at Fulton street, giving him an accurate description of Clara, but the officer had not seen her. On the corner of Dey street he met with the same result. At Cortlandt street he gained a clew. The officer there had piloted a girl over who answered her description and said she had gone down the Lane on the north side. Harry hastened down the great jewelry center. He scrutinized every one he met. As a general rule, excepting girls who are employed in the business houses of the downtown section of the city, but few females frequent the side streets. In fact, so few pass through these streets, that when they do, they are noticed by the numerous boys and business men thereabouts. Harry was relying upon this curious, but true fact, to gain some news of the girl he was pursuing. He therefore did not hesitate to ask everyone with whom he came in contact if they had seen such a girl as Clara was. In some cases he received a negative answer, while in others, not a few people admitted they had noticed her. According to the latter information, he traced her to Nassau street, and an Italian apple vender with a push-cart near the corner, said he had seen her turn the corner and proceed toward John street. Following up this clew, Harry met a man standing near the window of a haberdasher's store who asserted that he had seen such a person go through John street toward Broadway. He averred that she had gone into a building near the corner and pointed out the place to the young detective. When Harry reached the building in question, he paused and studied the business men's signs in the doorway. One in particular attracted his attention, worded this way: "Cliquot & Co., Diamonds, Second Floor Front." A curious smile flitted over the young detective's face and he passed into the narrow hall and ascended the stairs muttering: "I wonder if she's in there?" In the upper hall he saw the name of the dealer in precious stones, painted on the ground-glass window. Harry opened the door and strode in.