“My dear Mrs. Russo,” returned the Inspector in a pained voice, a little puffed smile in his cheeks, “we know already what you were doing in Mr. Morgan’s office this morning, so you won’t be conferring such a great favor on us after all.... I’m really surprised that you should be willing to incriminate yourself to that extent, Mrs. Russo. Blackmail is a mighty serious offense!” The woman grew deathly white. She half rose in the chair, gripping its arms. “So Morgan squealed after all, the dirty dog!” she snarled. “And I thought he was a wise guy. I’ll give him something to squeal about, take it from me!” “Ah, now you’re beginning to talk my language,” murmured the Inspector, leaning forward. “And just what is it you know about our friend Morgan?” “I know this about him—but look here, Inspector, I can give you a red-hot tip. You wouldn’t frame a poor lonely woman on a blackmail charge, would you?” The Inspector’s face lengthened. “Now, now, Mrs. Russo!” he said. “Is that a nice thing to say? Certainly I can’t make any promises....” He rose, his slender body deadly in its immobility. She shrank back a little. “You will tell me what you have on your mind, Mrs. Russo,” he said deliberately, “on the bare chance that I may show my gratitude in the generally accepted fashion. You will please talk—truthfully, do you understand?” “Oh, I know well enough you’re a tough nut, Inspector!” she muttered. “But I guess you’re fair, too.... What do you want to know?” “Everything.” “Well, it isn’t my funeral,” she said, in a more composed voice. There was a pause while Queen examined her curiously. In accusing her of blackmailing Morgan he had made a successful stab in the dark; now a flash of doubt assailed him. She seemed much too sure of herself if all she knew were the details of Morgan’s past, as the Inspector had taken for granted from the beginning of the interview. He glanced at Ellery and was apprehensively quick to note that his son’s eyes were no longer on the book but riveted on the profile of Mrs. Russo. “Inspector,” said Mrs. Russo, a shrill triumph creeping into her voice, “I know who killed Monte Field!” “What’s that?” Queen jumped out of his seat, a flush suffusing his white features. Ellery had straightened convulsively in his chair, his sharp eyes boring into the woman’s face. The book he had been reading slipped out of his fingers and dropped to the floor with a thud. “I said I know who killed Monte Field,” repeated Mrs. Russo, evidently enjoying the sensation she had caused. “It’s Benjamin Morgan, and I heard him threaten Monte _the night before he was murdered_!” “Oh!” said the Inspector, sitting down. Ellery picked up his book and resumed his interrupted study of “The Complete Guide to Handwriting Analysis.” Quiet descended once more. Velie, who had been staring at father and son in struggling amazement, seemed at a loss to understand their suddenly changed manner.