One of her two companions was a man turned sixty. He was pacing to and fro in a state of abject distress and violent agitation. His short, corpulent figure was shaking as if his every nerve had become a writhing, red-hot wire in his palpitating flesh. His round, florid face was streaming with perspiration. His hair, a tawny mop on a large, intellectual head, was in indescribable disorder. He was wringing his hands and moaning as if his heart was broken. The only other person present when Nick entered with his chief assistant, Chick Carter, was a tall, clean-cut man in the twenties, one Arthur Gordon, a successful broker and popular society man with whom Nick was well acquainted, and to whose urgent telephone request he then was responding. “Ah, here is Mr. Carter now,” he exclaimed, when the two detectives entered. “Thank goodness, Nick, you could come immediately. We’re up against it good and hard, a terrible robbery.” “H’m, is that so?” “You know Mr. Rudolph Strickland by name and reputation, I’m sure. This is his niece, Wilhelmina Strickland, from Boston. Now, do, Mr. Strickland, compose yourself, that Mr. Carter may lose no time in sifting this matter to the bottom.” There was, indeed, as Gordon had implied, little need of an introduction to Mr. Rudolph Strickland. His name was a familiar one in the best circles of New York society. He numbered among his friends and acquaintances nearly all of the distinguished artists, musicians, and literary people of any note, who were frequent visitors to his spacious apartments to admire his superb collection of art treasures, or hear his master hand manipulate his famous Stradivarius violin. He was in no sense a society man, nevertheless, being a somewhat reserved and eccentric German, with a passion for music, literature, and art, treasures of which he had collected from all parts of Europe, where he was a recognized connoisseur, critic, and man of letters. Age had begun to undermine his health, however, and for nearly five years he had occupied his present quarters on the second floor of the old Vanhausen mansion, richly furnished and containing most of the fine collection upon which he had expended a considerable part of his fortune. He was a bachelor and lived entirely alone, save when encroached upon by the woman who cared for his apartments, or by his artistic and literary friends. A glance around the parlor, while he responded to Arthur Gordon’s introduction and afterward presented Chick, gave Nick a hint at the character of the robbery. Several empty picture frames, from each of which the canvas had been removed, were lying on the floor and leaning against the walls; while vacant places on the mantel and in or on the several costly glass cabinets told the tale of depredation. “Gordon is right,” said he, as to the young man’s advice. “You must be calm, Mr. Strickland, or valuable time may be lost.”