“And that familiarity with her daily doings, together with the fact that they got away with the child so quickly and without any outcry, are very significant,” Chick added. “The child must have known her abductor, and the latter must have known that the child could be easily and quickly enticed away.” “Certainly. That also is obvious.” “Who is the woman, then, or man, as the case may be, who has been so friendly with the child to have felt sure of being able to successfully pull off such a job?” Nick laughed a bit grimly. “That is a pertinent question, Chick, more easily asked than answered,” he replied. “It is useless to speculate upon it at this stage of the game. We will await the promised letter from the rascals. We then may find the answer between the lines.” CHAPTER III. AN AUDACIOUS DEMAND. Nick Carter would not have been recognized by his most intimate friend when, at nine o’clock the following morning, he entered the Broad Street building in which the banking and brokerage offices of Madden, Mellen & Mack were located. Nick appeared, in fact, like an elderly investor in stocks and bonds, a sedate and deliberate old gentleman, modestly clad, and who hooked his cane over his arm while he produced and tendered a card to a clerk in the outer office, at the same time requesting an interview with the head of the firm. Nick was immediately conducted to an interior room, in which all three members of the firm were seated. It contained three roll-top desks, a table laden with books, papers, and documents, and a partly screened stand in one corner, on which was a large typewriter. Nick noticed that the machine was covered and that the stenographer had not yet arrived. Mr. Mellen, the second member of the firm, was an energetic man of middle age, their operator on the floor of the Stock Exchange, which necessitated his absence from the office during most of the business hours. He arose to go, in fact, very soon after the detective entered. The junior member was David Mack, who acted as cashier for the firm. He was much younger, still under forty, a well-built, clean-cut man, with a smoothly shaved face, quite dark and attractive. He was personally the most up-to-date and striking man of the three. Mr. Madden, looking pale and anxious after a sleepless night, at once arose to receive the detective. “I would never know you, Nick, had I forgotten your fictitious name,” he said, smiling gravely, while he shook hands with Nick. “I have confided in my partners, of course, from whom I have no secrets. Their discretion may be safely relied upon.” Nick acknowledged the introductions that followed, shaking hands with both bankers and remarking agreeably: “You have done quite right, Mr. Madden. These gentlemen will, I am sure, do what I advise in this matter.”