radioactivity was discovered, but it looked as though human intelligence would never be able to set it free from its prison. Nevertheless I have not only set it free, but I am able to control it as perfectly as if it were steam from a boiler, or an electric current from a dynamo."
Jack, who was as unscientific a person as ever lived, yawned, and Edmund noticed it. But he showed no irritation, merely smiling, and saying, with a wink at me and Henry:
"Even this seems to be rather too deep, so perhaps I had better show you, instead of telling you, what I mean. Excuse me a moment."
He stepped out of the door, and we remained seated. We heard a noise outside like the opening of a barn door, and immediately Edmund reappeared and closed the door of the chamber in which we were. We watched him with growing curiosity. With a singular smile he pressed a knob on the wall, and instantly we felt that the chamber was rising in the air. It rocked a little like a boat in wavy water. We were startled, of course, but not alarmed.
"Hello!" exclaimed Jack. "What kind of a balloon is this?"
"It's something more than a balloon," was Edmund's reply, and as he spoke he touched another knob, and we felt the car, as I must now call it, come to rest. Then Edmund opened a shutter at one side, and we all sprang up to look out. Below us we saw roofs and the tops of two trees standing at the side of the street.
"We're about a hundred feet up," said Edmund quietly. "What do you think of it now?"
"Wonderful! wonderful!" we exclaimed in a breath. And I continued:
"And do you say that it is inter-atomic energy that does this?"
"Nothing else in the world," returned Edmund.
But bantering Jack must have his quip:
"By the way, Edmund," he demanded, "what was it that Archimedes dreamed? But no matter; you've knocked him silly. Now, what are you going to do with your atomic balloon?"
Edmund's eyes flashed:
"You'll see in a minute."
The scene out of the window was beautiful, and for a moment we all remained watching it. The city lights were nearly all below our level, and away off over the New Jersey horizon I noticed the planet Venus, near to setting, but as brilliant as a diamond. I am fond of star-gazing, and I called Edmund's attention to the planet as he happened to be standing next to me.
"Lovely, isn't she?" he said with enthusiasm. "The finest world in the solar system, and what a strange thing that she should have one side always day and the other always night."
I was surprised by his exhibition of astronomic lore, for I had never known that he had given any attention to the subject, but a minute later the incident was forgotten as Edmund suddenly pushed us back from the window and closed the shutter.
"Going down again so soon?" asked Jack.
Edmund smiled. "Going," he said simply, and put his hand to one of the knobs. Immediately we felt ourselves moving very slowly.
"That's right, Edmund," put in Jack again, "let us down easy; I don't like bumps."
We expected at each instant to feel the car touch the cradle in which it had evidently rested, but never were three mortals so mistaken. What really did happen can better be described in the words of Will Church, who, you will remember, had disappeared at the beginning of our singular adventure. I got the account from him long afterwards. He had written it out carefully and put it away in a safe, as a sort of historic document. Here is Church's narrative, omitting the introduction, which read like a law paper:
"When we went over from the club to Stonewall's house, I dropped behind the others, because the four of them took up the whole width of the sidewalk. Stonewall was talking to them, and my attention was attracted by something uncommon in his manner. He had an indefinable carriage of the head which suggested to me the suspicion that everything was not just as it should be. I don't mean that I thought him crazy, or anything of that kind, but I felt that he had some scheme in his mind to fool us.
"I bitterly repented, after things turned out as they did, that I had not whispered a word to the others. But that would have been difficult, and, besides, I had no idea of the seriousness of the affair. Nevertheless, I determined to stay out of it, so that the laugh should not be on me at any rate. Accordingly when the others entered the car I stayed outside, and when Stonewall called me I did not answer.
"When he came out to open the roof of the shed, he did not see me in the shadow where I stood. The opening of the roof revealed the whole scheme in a flash. I had had no suspicion that the car was any kind of a balloon, and even after he had so significantly thrown the roof open, and then entered the car and closed the door, I was fairly amazed to see the thing began to rise without the slightest noise, and as if it were enchanted. It really looked diabolical as it floated silently upward and passed through the opening, and the sight gave me a shiver.
"But I was greatly relieved when it stopped at a height of a hundred feet or so, and then I said to myself that I should have been less of a fool if I had stayed with the others, for now they would have the laugh on me alone. Suddenly, while I watched, expecting every moment to see them drop down again, for I supposed that it was merely an experiment to show that the thing would float, the car started upward, very slowly at first, but increasing its speed until it had attained an elevation of perhaps five hundred feet. There it hung for a moment, like some mail-clad monster glinting in the quavering light of the street arcs, and then, without warning, made a dart skyward. For a minute it circled like a strange bird taking its bearings, and finally rushed off westward until I lost sight of it behind some tall buildings. I ran into the house to reach the street, but found the outer door locked, and not a person visible. I called but nobody came. Returning to the yard I discovered a place where I could get over the fence, and so I escaped into the street. Immediately I searched the sky for the mysterious car, but could see no sign of it. They were gone! I almost sank upon the pavement in a state of helpless excitement, which I could not have explained to myself if I had stopped to reason; for why, after all, should I take the thing so tragically. But something within me said that all was wrong. A policeman happened to pass.
"'Officer! officer!' I shouted, 'have you seen it?'
"'Seen what?' asked the blue-coat, twirling his club.
"'The car—the balloon,' I stammered.
"'Balloon in your head! You're drunk. Get long out o' here!'
"I realized the impossibility of explaining the matter to him, and running back to the place where I had got over the fence I climbed into the yard and entered the shed. Fortunately the policeman paid no further attention to my movements after I left him. I sat down on the empty cradle and stared up through the opening in the roof, hoping against hope to see them coming back. It must have been midnight before I gave up my vigil in despair, and went home, sorely puzzled, and blaming myself for having kept my suspicions unuttered. I finally got to sleep, but I had horrible dreams.
"The next day I was up early looking through all the papers in the hope of finding something about the car. But there was not a word. I watched the news columns for several days without result. Whenever the coast was clear I haunted Stonewall's yard, but the fatal shed yawned empty, and there was not a soul about the house. I cannot describe my feelings. My friends seemed to have been snatched away by some mysterious agency, and the horror of the thing almost drove me crazy. I felt that I was, in a manner, responsible for their disappearance.
"One day my heart sank at the sight of a cousin of Jack
