"I'm on my own," I said. I was thinking fast. "I'll bet you never knew Brion had a twin brother. He cut me out, though, so I thought I'd cut myself in." Maurice was interested. "The devil," he said. "You haven't seen your loving twin in a long time, I see." He grinned. I wondered what the joke was. "Let's get out of here," I said. "Let's keep it between us two." Maurice glanced at Pinay. "Forget him," I said. "He's dead." "You'd like that, wouldn't you, Baby?" Maurice said. "Just the two of us, and maybe then a chance to narrow it back down to one." His sardonic expression turned suddenly to a snarl, with nostrils flaring. "By God," he said, "you, you'd plan to kill me, you little man of straw--" He was leaning toward me now, arm loosening for a swing. I realized he was insane, ready to kill in an instantaneous fury. "You'll see who is the killer between us," he said. His eyes gleamed as he swung the blackjack loosely in his hand. I couldn't wait any longer. The gun popped into my hand, aimed at Maurice. I felt myself beginning to respond to his murder lust. I hated everything he stood for. "You're stupid, Maurice," I said. "Stupid and slow, and in just a minute, dead. But first you're going to tell me how you knew I wasn't Bayard." It was a nice try, but wasted. Maurice leaped and the slug-gun slapped him aside. He hit and lay limp. My arm ached from the recoil. Handling the tiny weapon was tricky. It was good for about fifty shots on a charge; at this rate it wouldn't last a day. I had to get out fast now. I reached up and smashed the ceiling light, then the table lamp. That might slow them up for a few moments. I eased out into the hall and started for the dark end. Behind me I heard the elevator opening. They were here already. I pushed at the glass door, and it swung open quietly. I didn't wait around to see what their reaction would be when they found Maurice and Georges. I went down the stairs two at a time, as softly as I could. I thought of my communicator and decided against it. I didn't have anything good to report. I passed three landings before I emerged into a hall. This would be the old roof level. I tried to remember where the stair had come out in the analogous spot back at Zero Zero. I spotted a small door in an alcove; it seemed to be in about the right place. A man came out of a room across the hall and glanced toward me. I rubbed my mouth thoughtfully, while heading for the little door. The resemblance was more of a hindrance than a help now. He went on, and I tried the door. It was locked, but it didn't look very strong. I put my hip against it and pushed. It gave way with no more than a mild splintering sound. The stairs were there, and I headed down. I had no plan other than to get in the clear. It was obvious that the impersonation was a complete flop. All I could do was to get to a safe place and ask for further instructions. I had gone down two flights when I heard the alarm bell start.