Here the memorandum ceased with a long line straggling from the letter y as if the writer had been surprised at his task. The effect upon me of these remarkable words was to heighten my interest and raise me into a state of renewed hope, if not of active expectation. Another mind than my own had been at work along the only groove which held out any promise of success, and this mind, having at its command certain family traditions, had let me into a most valuable secret. Another mind! Whose mind? That was a question easily answered. But one man could have written these words; the man who was thrust aside in early life in favor of his younger brother, and who now, by the sudden death of that brother’s daughter, had come again into his inheritance. Uncle David, and he only, was the puzzled inquirer whose self-communings I had just read. This fact raised a new problem far me to work upon, and I could but ask when these lines were written—before or after Mr. Pfeiffer’s death and whether he had ever succeeded in solving the riddle he had suggested, or whether it was still a baffling mystery to him. I was so moved by the suggestion conveyed in his final and half-finished sentence, that I soon lost sight of these lesser inquiries in the more important one connected with the filigree ball. For I had seen this filigree ball. I had even handled it. From the description given I was very certain that it had been one of the many trinkets I had observed lying on the dressing table when I made my first hasty examination of the room on the evening of Mrs. Jeffrey’s death. Why had no premonition of its importance as a connecting link between these tragedies and their mysterious cause come to me at the time when it was within reach of my hand? It was too late now. It had been swept away with the other loose objects littering the place, and my opportunity for pursuing this very promising investigation was gone for the night. Yet it was with a decided feeling of triumph that I finally locked the door of this old mansion behind me. Certainly I had taken a step forward since my entrance there, to which I had but to add another of equal importance to merit the attention of the superintendent himself. XXI. THE HEART OF THE PUZZLE. The next morning I swallowed my pride and sought out Durbin. He had superintended the removal of Mrs. Jeffrey’s effects from the southwest chamber, and should know, if any one, where this filigree ball was now to be found. Doubtless it had been returned with the other things to Mr. Jeffrey, and yet, who knows? Durbin is sly and some inkling of its value as a clue may have entered his mind. If so, it would be anywhere but in Mr. Jeffrey’s or Miss Tuttle’s possession.