A car was waiting for Carnes and Dr. Bird when the Langley Field plane slid down to a landing at Atlanta. At the penitentiary, Dr. Bird went direct to the infirmary where Karuska had been confined. As he entered, he shot a keen glance around and gave an exclamation of satisfaction.

"Look at the windows, Carnes," he cried.

Carnes went over to the nearest window and moistened his finger tip and applied it experimentally to the gla.s.s. The moisture produced no effect, for the gla.s.s of the windows was permanently clouded as was that of the doctor's laboratory.

"Whatever happened in my laboratory the night before last was repeated here last night with a similar object," said the doctor. "The object there was to steal a gun model; here it was to steal a man who could construct a full-sized gun from the model. I understand that one of the guards escaped the fate which overtook the rest of the persons in the infirmary?"

"Not altogether, Doctor," replied the warden. "I think that his mind is somewhat affected, for he tells a wild yarn and insists on trying to wear a goldfish bowl on his head. I have him under observation in the psychopathic ward."

Dr. Bird shot a scornful glance at the warden.

"'There are none so blind as those who will not see'," he murmured.

"By all means, I wish to see him," he went on aloud. "Will you have him brought here at once, please?"

The warden nodded and spoke to one of the attendants. In a few moments a tall, fair-haired young giant stood before the doctor. Dr. Bird pushed back his unruly shock of black hair with his fingers, those long slim mobile fingers which alone betrayed the artist in his make-up, and shot a piercing glance from his black eyes into the blue ones, which returned the gaze unabashed.

"What is your name?" he asked.

"Bailley, sir."

"You were on guard here last night?"

"Yes, sir. I was detailed as a special guard over No. 9764."

"Tell me in your own words just what happened. Don't be afraid to speak out; I'm not going to disbelieve you; and above all, tell me everything, no matter how unimportant it may seem to you. I'll judge the importance of things for myself. I'm Dr. Bird of the Bureau of Standards."

The guard's face lighted up at the doctor's words.

"I've heard of you, Doctor," he said in a relieved tone, "and I'll be glad to tell you everything. At ten o'clock last night, I relieved Carragher as special guard over No. 9764. Carragher reported that the prisoner was somewhat restless and hadn't been asleep as yet. I sat down about fifteen feet from his bed and prepared to keep an eye on him until I was relieved at six o'clock this morning.

"Nothing happened until about two o'clock. No. 9764 was restless as Carragher had said, but toward midnight he quieted down and apparently went to sleep. I was sleepy myself, and I got up and took a turn around the room every five minutes to be sure that I kept awake.

That's how I am so sure of the time, sir."

Dr. Bird nodded.

"At five minutes to two, just as I got up, I heard a noise outside like a big electric fan. It sounded like it came from directly overhead and I went to the window and looked out. I couldn't see anything, although I could hear it pretty plainly, and then I heard a noise like something had fallen on the roof. Almost at the same time there came a sort of high-pitched whine, a good deal like the noise an electric motor makes when it is running at high speed.

"I thought of giving an alarm, but I didn't want to stir things up unless I was sure that there was some necessity for it, so I started for the door to ask one of the outside guards if he had heard anything. As I turned toward No. 9764 I saw that he had been sitting up in bed while my back was turned. As soon as he saw that I noticed him, he lay back real quick and pulled the covers over his head. He moved pretty quick, but not so quick that I couldn't see that he had something that glittered like gla.s.s before his face. I started over toward his bed to see what he was doing and then it was that the lights started to get dim!"

"Go on!" said the doctor as Bailley paused. His eyes were glittering brightly now.

"Well, sir, Doctor, I don't hardly know how to describe what happened next. The lights were getting dim, but not as they ordinarily do when the current starts to go off. The filaments were shining as bright as they ever did, but the light didn't seem to be able to penetrate the air. The whole room seemed to be filled with a blackness that stopped the light. No, sir, it wasn't like fog; it was more like something more powerful than the lights was in the room and was killing them.

"It wasn't only the lights which were affected, it was me as well.

This blackness, whatever it was, was getting into me as well as into the room, and I couldn't seem to make myself think like I wanted to. I tried to yell to give an alarm, and I found that I could hardly whisper. I went toward the bed and then I saw No. 9764 sit up again.

He had a goldfish bowl pulled down over his head and it was evident that it was keeping the blackness away, for I could see him plainly and his eyes were as bright as ever.

"The nearer I got to him, the funnier I felt, and I began to be afraid that I would go out. No. 9764 got up out of bed, and I could see him grinning at me through the bowl. He reached up and adjusted that bowl, and all of a sudden I realized that whatever was knocking me out was not affecting him because he had that thing on. I jumped for him with the idea of taking the bowl off and putting it on my own head. He saw what I was up to and he fought like a cornered rat, but the blackness hadn't affected my muscles. I'm a pretty big man, sir, and No. 9764 is a little runt, and it didn't take me long to get the bowl off his head and pulled on over mine. As soon as I did that, I seemed to be able to think clearer. I was sitting on No. 9764 and was ready to tap him with a persuader if he started anything, but I didn't have to. In a few minutes he stopped struggling and lay perfectly quiet.

"The lights kept getting dimmer and dimmer until they went out altogether and the room became pitch dark. It wasn't exactly as if the lights had gone out, sir; I seemed to know that they were still there and were burning as bright as ever, but they couldn't penetrate the blackness in the room, if you understand what I mean."

"I think I do," said Dr. Bird slowly. "It was a good deal as if you had seen a gla.s.s filled with a pale red liquid and someone had dumped black ink into the fluid and hid the red color. You would know that the red was still there, but you wouldn't be able to see it through the black."

"That's exactly what it was like, Doctor; you have described it better than I can. At any rate, after it got real dark I heard a low whistle from the roof. No. 9764 made a struggle to get up for a moment and then lay quiet again. The whistle sounded again and then I heard some one call 'Caruso.' Everything was quiet for a while and then the same voice called again and said some stuff in a foreign language that I couldn't understand. I kept perfectly quiet to see what would happen.

"For about ten minutes the room remained perfectly dark, as I have said, and all the while I could hear that whining noise. All of a sudden it began to sound in a lower note and then I could see the lights again, very dimly and like the black ink you spoke of was fading out. The note got lower until it stopped altogether, and the lights came on brighter until they were normal again. Then I heard a sc.r.a.ping noise on the roof and the noise I had heard at first like a big electric fan. I looked at the clock. It was two-twenty.

"For a few minutes I wasn't able to collect my wits. When I got up off of No. 9764 at last he stared at me as though he didn't know a thing, and I heaved him back into his bed and ran to the door to summon an outside guard. I could still talk in a husky whisper, but not loud, and I wasn't surprised when no one heard me. My orders were not to let No. 9764 out of my sight, but this was an emergency, so I left the ward and found a guard. It was Madigan and he was standing on his beat staring at nothing. When I touched him he looked at me and there was the same vacant look in his eyes that I had seen in the prisoner's. I talked to him in a whisper, but he didn't seem to understand, so I left him and went to a telephone and called for help. Mr. Lawson, the warden, got here with guards in a couple of minutes and I tried to tell him what had happened, but I couldn't talk loud, and I was afraid to take the fish bowl off my head."

"What happened next?"

"Mr. Lawson took me to his office, and on the way we pa.s.sed under an arc light. As soon as I got under it I begin to feel better, and my voice came stronger. I saw that it was doing me some good and I stopped under it for an hour before my voice got back to normal. It seemed to clear the fog from my brain, too, and I was able, about four o'clock, to tell everything that had happened. Mr. Lawson seemed to think that my brain was affected as well as the others' and he sent me to the hospital. That's all, Doctor."

"Do you feel perfectly normal now?"

"Yes, sir."

"There is no need for confining this man longer, Mr. Lawson. He is as well as he ever was. Carnes, get the Walter Reed Hospital on the telephone and tell them that I said to treat Lieutenant Breslau with light rays, rich in ultra-violet. Tell them to give him an overdose of them and not to put goggles on him. Keep him in the sun all day and under sun-ray arcs at night until further orders. Mr. Lawson, give the same treatment to the men who were disabled last night. If you haven't enough sun-ray arcs in your hospital, put them under an ordinary arc light in the yard. Bailley, have you still got that goldfish bowl?"

"It is in my office, Doctor," said the warden.

"Good enough! Send for it at once. By the way, you have two more communists here, Denberg and s.e.m.e.nsky, haven't you?"

"I think so, although I will have to consult the records before I can be positive."

"I am sure that you have. Look the matter up and let me know."

The warden hurried away to carry out the doctor's orders, and an orderly appeared in a few moments with a hollow globe made of some crystalline transparent substance. Despite its presence in the infirmary the evening before, there was no trace of clouding apparent.

Dr. Bird took it and examined it critically. He rapped it with his knuckles and then stepped to the door and hurled it violently down on the concrete floor of the yard. The globe rebounded without injury and he caught it.

"Vitrilene, or a good imitation of it," he remarked to Carnes. "After you get through talking to the hospital, get Taylor on the wire. There is plenty of loose vitrilene in the Bureau, and I want him to send down about fifty square feet of it by a special plane at once."

As Carnes left the room, the warden reappeared.

"The men are all lying in the sun now, Doctor," he said. "I find that we have the two men you mentioned confined here. They are both in Tier A, Building 6."