Mary-'Gusta, left alone, looked wide-eyed about the little back sitting-room. It, too, was changed; not changed as much as the front parlor, but changed, nevertheless. Most of the furniture had been removed. The most comfortable chairs, including the rocker with the parrot “tidy” on the back, had been taken away. One or two of the bolt-upright variety remained and the “music chair” was still there, but pushed back into a corner. Mary-'Gusta saw the music chair and a quiver of guilty fear tinged along her spine; that particular chair had always been, to her, the bright, particular glory of the house. Not because it was beautiful, for that it distinctly was not; but because of the marvellous secret hidden beneath its upholstered seat. Captain Marcellus had brought it home years and years before, when he was a sea-going bachelor and made voyages to Hamburg. In its normal condition it was a perfectly quiet and ugly chair, but there was a catch under one arm and a music box under the seat. And if that catch were released, then when anyone sat in it, the music box played “The Campbell's Are Coming” with spirit and jingle. And, moreover, kept on playing it to the finish unless the catch was pushed back again. To Mary-'Gusta that chair was a perpetual fascination. She had been expressly forbidden to touch it, had been shut in the dark closet more than once for touching it; but, nevertheless, the temptation was always there and she had yielded to that temptation at intervals when Mrs. Hobbs and her stepfather were out. And the last time she had touched it she had broken the catch. She had wound up the music box, after hearing it play, but the catch which made it a perfectly safe seat and not a trap for the unwary had refused to push back into place. And now there it was, loaded and primed, so to speak, and she was responsible. Suppose--Oh, horrible thought!--suppose anyone should sit in it that afternoon! She gasped and jumped off the sofa. Then she remembered Mrs. Hobbs' parting command and stopped, hesitating. Mr. Hallett, standing at the end of the hall, by the front door, heard her move and tiptoed to the sitting-room. “What's the matter, little girl?” he whispered, soothingly. “No-nothin',” gasped Mary-'Gusta. “You're sure?” “Ye-yes, sir.” “All right. Then you set down on the sofa and keep still. You mustn't make any noise. The folks are comin' now. Set right down on the sofy, that's a good girl!”