the sump in the next room, the bomb lay quietly ticking. How long...? The main assembly was ready now. I laid out cables, tying my apparatus in to the atomic power-source buried under the vault. The demand, for one short instant, would tax even those mighty engines. I fixed hooks at the proper points in the room, wove soft aluminum wire in the correct pattern. I was almost finished now. How long? I made the last connections, cleared away the litter. The matter transmitter stood on the table, complete. At any instant, the bomb would reduce it—and the secret of its construction—to incandescent gas—unless I transmitted the bomb out of range first. I turned toward the laundry room—and the telephone rang. I hesitated, then crossed the room and snatched it up. "Listen to me," Kayle said grimly. "Give me straight, fast answers. You said the Master Tape was there, in the vault with you. Now tell me: What does it look like?" "What?" "The ... ah ... dummy tape. What is its appearance?" "It's a roughly square plastic container, bright yellow, about a foot thick. What about it?" Kayle's voice sounded strained. "I've made inquiries. No one here seems to know the exact present location of the Master Tape. Each department says that they were under the impression that another handled the matter. I'm unable to learn who, precisely, removed the Tape from the vault. Now you say there is a yellow plastic container—" "I know what the Master Tape looks like," I said. "This is either it or a hell of a good copy." "Granthan," Kayle said. There was a note of desperation in his voice now. "There have been some blunders made. I knew you were under the influence of the Gool. It didn't occur to me that I might be too. Why did I make it possible for you to successfully penetrate to the Central Vault? There were a hundred simpler ways in which I could have dealt with the problem. We're in trouble, Granthan, serious trouble. The tape you have there is genuine. We've all played into the enemy's hands." "You're wasting valuable time, Kayle," I snapped. "When does the bomb go up?" "Granthan, there's little time left. Bring the Master Tape and leave