once and make sure, at least, that Mrs. Walter Newberry is not in some other part of it!"
"You are right—quite right!" the little man pattered rapidly from door to door, throwing the rooms open to the impatient scrutiny of the psychologist; and while they were still engaged in this search upon the upper floor, a tall clock on the landing of the stairs struck eleven!
So strongly had the warning of the note impressed Trant that, at the signal of the hour, he stopped short; the others, seeing him, stopped too, and stared at him with blanched faces, while all three apprehensively strained their ears for some sound which might mark the note's fulfillment. And scarcely had the last deep stroke of the hour ceased to resound in the hall, when suddenly, sharply, and without other warning, a revolver shot rang out, followed so swiftly by three others that the four reports rang almost as one through the silent house. The little woman screamed and seized her husband's arm. His hand, in turn, hung upon Trant. The psychologist, turning his head to be surer of the direction of the sound, for an instant more stared indecisively; for though the shots were plainly inside the house, the echoes made it impossible to locate them exactly. But almost immediately a fifth shot, seeming louder and more distinct in its separateness, startled them again.
"It is in the billiard room!" the wife shrieked, with a woman's quicker location of indoor sounds.
The little minister ran to seize the lamp, as Trant turned toward the rear of the house. The woman
