influence of the hammering man on her movements,” the psychologist said. “But as to her connection with the man and her reasons, that is another matter. But of that I cannot say till I have had half an hour to myself at the Crerar Library.” “The library, Mr. Trant?” cried young Edwards, in surprise. “Yes; and, as speed is certainly essential, I hope you still have your motor below.” As young Edwards nodded, the psychologist seized his hat and gloves and his instrument case, and preceded the others from the office. Half an hour later he descended from the library to rejoin the Edwardses waiting in the motor. “The man who inserted that advertisement—the hammering man, I believe, of whom we are in search,” he announced briefly, “is named N. Meyan, and he is lodging, or at least can be addressed at No. 7 Coy Court. The case has suddenly developed far darker and more villainous aspects even than I feared. Please order the chauffeur to go there as rapidly as possible.” Coy Court, at which, twenty minutes later, he bade young Edwards stop the motor, proved to be one of those short, intersecting streets that start from the crowded thoroughfare of Halstead Street, run a squalid block or two east or west, and stop short against the sooty wall of a foundry or machine shop. No. 7, the third house on the left—like many of its neighbors, whose window’s bore Greek, Jewish, or Lithuanian signs—was given up in the basement to a store, but the upper floors were plainly devoted to lodgings. The door was opened by a little girl of eight. “Does N. Meyan live here?” the psychologist asked. “And is he in?” Then, as the child nodded to the first inquiry and shook her head at the second: “When will he be back?” “He comes to-night again, sure,” she said. “Perhaps sooner. But to-night, or to-morrow, he goes away for good. He have paid only till to-morrow.” “I was right, you see, in saying we had need for haste,” Trant said to young Edwards. “But there is one thing we can try, even though he is not here. Let me have the picture you showed me this morning!” He took from Winton’s hand the picture of Eva Silber, opened the leather case, and held it so the child could sec. “Do you know that lady?” “Yes!” The child showed sudden interest. “It is Mr. Meyan’s wife.”