She had been mistaken, or had deliberately lied, for the drawer was empty. And I told her so, with considerable heat. "Ah, we all make mistakes, I think," she murmured with her enigmatic shrug. "What I want to know," I said as I banded the four papers together and thrust them down in my pocket, "is just how you got that first code from my young friend the lieutenant?" She smiled again, a little wearily, as I swung the safe door shut and locked it. She did not rise from the chair. But as I stood confronting her, something in my attitude, apparently, struck her as distinctly humorous. For she broke into a sudden and deeper ripple of laughter. There was, however, something icy and chilling in it. Her eyes now seemed more veiled. They had lost their earlier look of terror. Her face seemed to have relaxed into softer contours. "Would you like to know?" she said, lifting her face and looking with that older, half-mocking glance into my own. She was speaking slowly and deliberately, and I could see the slight shrug she gave to one panther-like shoulder. "Would _I_ be so out of place in a ballroom? Ah, have not more things than hearts been lost when a man dances with a woman?" "I see--you mean you stole it, at the Plaza?" "Not at all, monsieur!" she murmured languidly back. Then she drew a deeper breath, and sat more rigid in her straight-back chair. Something about her face, at that moment, puzzled me. It seemed to hold some latent note of confidence. The last trace of fear had fled from it. There was something strangely like triumph, muffled triumph, in it. An arrow of apprehension shot through me, as I stooped peering into her shadowy eyes. It went through my entire body, sharp as an electric shock. It brought me wheeling suddenly about with my back to her and my face to the open room. Then I understood. I saw through it all, in one tingling second. For there, facing me, stood the figure of a man in navy blue. It was the same figure that I had followed through the square. But now there was nothing secretive or circuitous about his attitude. It was quite the other way; for as he stood there he held a blue-barreled revolver in his hand. And I could see, only too plainly, that it was leveled directly at me. The woman's ruse had worked. I had wasted too much time. The confederate for whom she was plainly waiting had come to her rescue. The man took three or four steps farther into the room. His revolver was still covering me. I heard a little gasp from the woman as she rose to her feet. I took it for a gasp of astonishment. "You are going to kill him?" she cried in German. "Haven't I got to?" asked back the man. He spoke in English and without an accent. "Don't you understand _he's a safe-breaker_? He's broken into this house? So! He's caught in the act--he's shot in self-defense!"