that we were completely invisible to the ground, half the heavens being hidden by the black pall. For an hour the beam worked its way toward us.

"The hole is about four hundred yards in diameter right now," said Carpenter as he turned from the telephone. "I have told them to stop the movement of the reflectors, and as soon as the air clears a little, we'll start through."

It took another hour for the soot to clear enough that we could plainly detect the ring of red light before us. Carpenter gave some orders to the ground, and a gap thirty yards wide opened in the wall before us. Toward this gap the flyer moved slowly under the side thrust of the diverted motor discharge. The temperature rose rapidly as we neared the wall of red light before us. Nearer we drew until the light was on both sides of us. Another few feet and the flyer shot forward with a jerk that threw me sprawling on the floor. Carpenter fell too, but he maintained his hold on the controls and tore at them desperately to check us.

I scrambled to my feet and watched. The red wall was alarmingly close. Nearer we drove and then came another jerk which threw me sprawling again. The wall retreated. In another moment we were standing still, with the red all around us at a distance of about two hundred yards.

"We had a narrow escape from being cremated," said Carpenter with a shaky laugh. "I knew that our speed would increase as soon as we got clear of the layer but it caught me by surprise just the same. I had no idea how great the holding effect of the stuff was. Well, First Mortgage, the road to space is open for us. May I invite you to be my guest on a little week-end jaunt to the Moon?"

"No thanks, Jim," I said with a wry smile. "I think a little trip to the edge of the layer will quite satisfy me."

"Quitter," he laughed. "Well, say good-by to familiar things. Here we go!"

He turned to the controls of the flyer, and presently we were moving again, this time directly away from the earth. There was no jerk at starting this time, merely a feeling as though the floor were pressing against my feet, a great deal like the feeling a person gets when they rise rapidly in an express elevator. The indicator showed that we were traveling only sixty miles an hour. For half an hour we continued monotonously on our way with nothing to divert us. Carpenter yawned.

"Now that it's all over, I feel let down and sleepy," he announced. "We are well beyond the point to which Hadley penetrated and so far we have met with no resistance. We are probably nearly at the outer edge of the layer. I think I'll shoot up a few miles more and then call it a day and go home. We are about eighty miles from the earth now."

I looked down, but could see nothing below us but the dense cloud of black soot resulting from the destruction of the heaviside layer. Like Carpenter, I felt sleepy, and I suppressed a yawn as I turned again to the window.

"Look here, Jim!" I cried suddenly. "What's that?"

He moved in a leisurely manner to my side and looked out. As he did so I felt his hand tighten on my shoulder with a desperate grip. Down the wall of red which surrounded us was coming an object of some kind. The thing was fully seventy-five yards long and half as wide at its main portion, while long irregular streams extended for a hundred yards on each side of it. There seemed to be dozens of them.

"What is it, Jim?" I asked in a voice which sounded high and unnatural to me.

"I don't know," he muttered, half to me and half to himself. "Good Lord, there's another of them!"

He pointed. Not far from the first of the things came another, even larger than the first. They were moving sluggishly along the red light, seeming to flow rather than to crawl. I had a horrible feeling that they were alive and malignant. Carpenter stepped back to the controls of the flyer and stopped our movement; we hung in space, watching them. The things were almost level with us, but their sluggish movement was downward toward the earth. In color, they were a brilliant crimson, deepening into purple near the center. Just as the first of them came opposite us it paused, and slowly a portion of the mass extended itself from the main bulk; and then, like doors opening, four huge eyes, each of them twenty feet in diameter, opened and stared at us.

"It's alive, Jim," I quavered. I hardly knew my own voice as I spoke.

Jim stepped back to the controls with a white face, and slowly we moved closer to the mass. As we approached I thought that I could detect a fleeting passage of expression in those huge eyes. Then they disappeared and only a huge crimson and purple blob lay before us. Jim moved the controls again and the flyer came to a stop.

Two long streamers moved out from the mass. Suddenly there was a jerk to the ship which threw us both to the floor. It started upward at express train speed. Jim staggered to his feet, grasped the controls and started all four bow motors at full capacity, but even this enormous force had not the slightest effect in diminishing our speed.

"Well, the thing's got us, whatever it is," said Jim as he pulled his controls to neutral, shutting off all power. Now that the danger had assumed a tangible form, he appeared as cool and collected as ever, to my surprise, I found that I had recovered control of my muscle and of my voice. I became aware that the shoulder which Jim had gripped was aching badly, and I rubbed it absently.

"What is it, Jim?" I asked for the third time.

"I don't know," he replied. "It is some horrible inhabitant of space, something unknown to us on earth. From its appearance and actions, I think it must be a huge single-celled animal of the type of the earthly amoeba. If an amoeba is that large here, what must an elephant look like? However, I expect that we'll learn more about the matter later because it's taking us with it, wherever it's going."

Suddenly the flyer became dark inside. I looked at the nearest window, but I could not even detect its outline. I reached for the light switch, but a sudden change in direction threw me against the wall. There was an instant of intense heat in the flyer.

"We have passed the heaviside layer," said Jim. "The brute has changed direction, and we felt that heat when he took us through the infra-red wall."

I reached again for the light switch, but before I could find it our motion ceased and an instant later the flyer was filled with glaring sunlight. We both turned to the window.

We lay on a glistening plain of bluish hue which stretched without a break as far as we could see. Not a thing broke the monotony of our vision. We turned to the opposite window. How can I describe the sight which met our horrified gaze? On the plain before us lay a huge purple monstrosity of gargantuan dimensions. The thing was a shapeless mass, only the four huge eyes standing out regarding us balefully. The mass was continually changing its outline and, as we watched, a long streamer extended itself from the body toward us. Over and around the flyer the feeler went, while green and red colors played over first one and then another of the huge eyes before us. The feeler wrapped itself around the flyer and we were lifted into the air toward those horrible eyes. We had almost reached them when the thing dropped us. We fell to the plain with a crash. We staggered to our feet again and looked out. Our captor was battling for its life.

Its attacker was a smaller thing of a brilliant green hue, striped and mottled with blue and yellow. While our captor was almost formless, the newcomer had a very definite shape. It