The receiver began clicking again. They're still worried about my morale, I thought. I went over and pulled out the tape. It said:

BRONSON HERE. SUGGEST YOU TRY LAST RESORT.

Dr. Bronson was the project director. It was a moment before I realized what he meant. When I did I hesitated for several minutes. Then I shrugged and tapped out, O.K.

I knew what had been happening down there. They had fed all the data I could give them through a computer, and the computer had said no dice. There was no solution to the problem, at least none that a computer could think of with the data available. There was still the Last Resort.

I wondered if cyanide might not be more pleasant. Well, the exects would have scientific interest anyway. The Last Resort was still Top Secret. And highly experimental. It was a new drug with a name a foot long, called LRXD for short. It had come out of the old experiments with lysergic acid and mescalin. I had never heard of its existence until a few hours before lift-off from Lunar Base. Then Dr. Bronson had given me a single ampule of the stuff. He had held it up to the light, looking through it. He said, "This is called LRXD. No one knows exactly what it will do. The lab boys say the 'LR' stands for Last Resort."

What it was supposed to do was increase mental efficiency in human beings. Sometimes it did. They had given it to one volunteer and then shown him an equation which it had taken a computer ten minutes to solve. He wrote down the answer at once, apparently having gone through the entire process in his head instantaneously.

Dr. Bronson told me, "It isn't just a matter of I.Q. It increases the total level of consciousness. Ordinarily the human brain screens out thousands of irrelevant stimuli. You're not aware of your watch ticking, or the fly on the wall, or your own body odor. You just don't notice them. But under LRXD, the brain becomes aware of everything simultaneously. Nothing is screened out. Furthermore, the subject is capable of correlating everything. The human brain becomes as efficient as a Mark 60 computer, with the advantage of imagination and intuition. We don't know how it works yet, or exactly what it does. I hate to say this. But there's even some evidence that the drug increases telepathic ability."

But then again, three of the volunteers had gone insane after taking the drug. Two had died. On some of the others there was no apparent effect at all.

"We don't even know whether the effects are permanent or temporary," Bronson had added.

So now I was supposed to take this Last Resort and then try to think of a way out of my predicament, with my I.Q. boosted up to a thousand or so. It made me think of my college days, when I had stayed up all night on benzedrine, writing term papers. I remembered Bronson's description of one of the volunteers who had gone insane, and shuddered. Well, I had nothing to lose.