He sat in his easy chair within the four walls of his own office, inspecting a line of people who stood before him on the carpet forming a single and attentive rank. In this rank were five men: a policeman, a cab driver, an agent of the telephone company, an agent of the electric company, and a reformed burglar carrying a kit of his trade tools.
The Tracer of Lost Persons gazed at them, meditatively joining the tips of his thin fingers.
"I want the number on 36 East Eighty-third Street changed to No. 38, and the number 38 replaced by No. 36," he said to the policeman. "I want it done at once. Get a glazier and go up there and have it finished in an hour. Mrs. Kenna, caretaker at No. 36, is in my pay; she will not interfere. There is nobody in No. 38: Mr. Kerns leaves there to-night and the Burglar Alarm Company takes charge to-morrow."
And, turning to the others: "You," nodding at the reformed burglar, "know your duty. Mike!" to the cab driver, "don't miss Mr. Kerns at the Lenox Club. If he calls you before eleven, drive into the park and have an accident. And you," to the agent of the telephone company, "will sever all telephone connection in Mrs. Stanley's house; and you," to the official of the electric company, "will see that the circuit in Mrs. Stanley's house is cut so that no electric light may be lighted and no electric bell sound."
The Tracer of Lost Persons stroked his gray mustache thoughtfully. "And that," he ended, "will do, I think. Good night."
He rose and stood by the door as the policeman headed the solemn file which marched out to their duty; then he looked at his watch, and, as it was already a few minutes after eight, he called up No. 36 East Eighty-third Street, and in a moment more had Mrs. Stanley on the wire.
"Good evening," he said pleasantly. "I suppose you have just arrived from Rosylyn. I may be a little late--I may be very late, in fact, so I called you up to say so. And I wished to say another thing; to ask you whether your servants could recollect ever having seen a young man about the place, a rather attractive young man with excellent address and manners, five feet eleven inches, slim but well built, dark hair, dark eyes, and dark mustache, offering samples of Georgia marble for sale."