"There is a storeroom beyond that door, O'Shea. In that storeroom, quiescent in sterile containers, lie spores. Countless thousands, millions of them. They are the granules I made for the government before I discovered their real nature. There lies beyond that door a weapon potent enough to end this war immediately—"

He paused suddenly. We had all heard it, the squeak of a worn hinge, the shuffle of a footstep. I motioned Mallory to silence, tiptoed to the office door and flung it open.

The aviator, Krassner, stood there. He was smiling. He said, "Ah, there you are, Captain! I was looking for you. I wanted to ask if—"

"How long have you been here?" I asked angrily.

"How long? Why—just a minute or so. I—"

"Were you listening to our conversation?"

He stiffened; a flush highlighted his cheek bones.

"I beg your pardon, sir!" he said.

"Because, if you were—" Dr. Mallory was beside me, his hand was on my arm. I hesitated. There was no sense in being so violently suspicious. I said, "Well, never mind. Go back to your quarters, Krassner. I'll be with you shortly."

"Very good, sir!" He saluted, turned and stalked from the office, a picture of affronted honor and dignity. I felt somewhat ashamed of myself.