They went together in a great leap off the platform onto the rocks, and rolled in a bright patch of Earthlight. First one on top, then the other.

They rolled unheeding to the brink. Here, beyond the midway ledge which held the camp, it was a sheer drop of a thousand feet, on down to the crater floor.

The figures were rolling; then one shook himself loose; rose up, seized the other and, with desperate strength, shoved him--

The victorious figure drew back to safety. The other fell, hurtling down into the shadows past the camp level--down out of sight in the darkness of the crater floor.

Snap, who was in the group near Grantline at the window gasped, "G.o.d!

Was that Gregg who fell?"

No one could say. No one answered. Outside, on the camp ledge, another helmeted figure now became visible. It was not far from the main building when Grantline first noticed it. It was running fast, bounding toward the spider staircase. It began mounting.

And now still another figure became visible--the giant Martian again.

He appeared from around the corner of the main Grantline building. He evidently saw the winner of the combat on the cliff, who now was standing in the Earthlight, gazing down. And he saw too, no doubt, the second figure mounting the stairs. He stood quite near the window through which Grantline and his men were gazing, with his back to the building, looking up to the summit. Then he ran with tremendous leaps toward the ascending staircase.

Was it Haljan standing up there on the summit? Who was it climbing the stairs? And was the third figure Miko?

Grantline's mind framed the questions. But his attention was torn from them, and torn even from the swift silent drama outside. The corridor was ringing with shouts.

"We're imprisoned! Can't get out! Was Haljan killed? The brigands are outside!"

And then an interior audiphone blared a calling for Grantline. Someone in the instrument room of the adjoining building was talking.

"Commander, I tried the telescope to see who got killed--"

But he did not say who got killed, for he had greater news.

"Commander! The brigand ship!"

Miko's reinforcements had come.

XXV

Not Wilks, but Coniston! His drawling, British voice:

"You, Gregg Haljan! How nice!"

His voice broke off as he jerked his arm from me. My hand with the projector came up, but with a sweeping blow he struck my wrist. The weapon dropped to the rocks.

I fought instinctively, those first moments; my mind was whirling with the shock of surprise. This was not Wilks, but the brigand Coniston.

It was an eerie combat. We swayed; shoving, kicking, wrestling. His hold around my middle shut off the Erentz circulation; the warning buzz rang in my ears, to mingle with the rasp of his curses. I flung him off, and my Erentz motors recovered. He staggered away, but in a great leap came at me again.

I was taller, heavier and far stronger than Coniston. But I found him crafty, and where I was awkward in handling my lightness, he seemed more skillfully agile.

I became aware that we were on the twenty foot square grid of the observatory platform. It had a low metal railing. We surged against it. I caught a dizzying glimpse of the abyss. Then it receded as we bounced the other way. And then we fell to the grid. His helmet bashed against mine, striking as though b.u.t.ting with the side of his head to puncture my visor panel. His gloved fingers were clutching at my throat.

As we regained our feet, I flung him off, and bounded like a diver, head first, into him. He went backward, but skillfully kept his feet under him, gripped me again and shoved me.

I was tottering at the head of the staircase--falling. But I clutched at him. We fell some twenty or thirty feet to be next lower spider landing. The impact must have dazed us both. I recall my vague idea that we must have fallen down the cliff.... My air shut off--then it came again. The roaring in my ears was stilled; my head cleared, and I found that we were on the landing, fighting.

He presently broke away from me, bounded to the summit with me after him. In the close confines of the suit I was bathed in sweat and gasping. I had no thought to increase the oxygen control. I could not find it; or it would not operate.

I realized that I was fighting sluggishly, almost aimlessly. But so was Coniston!

It seemed dreamlike. A phantasmagoria of blows and staggering steps. A nightmare with only the horrible vision of this goggled helmet always before my eyes.

It seemed that we were rolling on the ground, back on the summit. The unshadowed Earthlight was clear and bright. The abyss was beside me.

Coniston, rolling, was now on top, now under me, trying to shove me over the brink. It was all like a dream--as though I were asleep, dreaming that I did not have enough air.

I strove to keep my senses. He was struggling to roll me over the brink. G.o.d, that would not do! But I was so tired. One cannot fight without oxygen!

I suddenly knew that I had shaken him off and gained my feet. He rose, swaying. He was as tired, confused, as nearly asphyxiated as I.

The brink of the abyss was behind us. I lunged, desperately shoving, avoiding his clutch.

He went over, and fell soundlessly, his body whirling end over end down into the shadows, far below.

I drew back. My senses faded as I sank panting to the rocks. But with inactivity, my heart quieted. My respiration slowed. The Erentz circulation gained on my poisoned air. It purified.

That blessed oxygen! My head cleared. Strength came. I felt better.

Coniston had fallen to his death. I was victor. I went to the brink cautiously, for I was still dizzy. I could see, far down there on the crater floor, a little patch of Earthlight in which a mashed human figure was lying.

I staggered back again. A moment or two must have pa.s.sed while I stood there on the summit, with my senses clearing and my strength renewed as the blood stream cleared in my veins.

I was victor. Coniston was dead. I saw now, down on the lower staircase below the camp ledge, another goggled figure lying huddled.

That was Wilks, no doubt. Coniston had probably caught him there, surprised him, killed him.

My attention, as I stood gazing, went down to the camp buildings.

Another figure was outside! It bounded along the ledge, reached the foot of the stairs at the top of which I was standing. With agile leaps, it came mounting at me!

Another brigand! Miko? No, it was not large enough to be Miko. I was still confused. I thought of Hahn. But that was absurd: Hahn was in the wreck of the _Planetara_. One of the stewards then....

The figure came up the staircase recklessly, to a.s.sail me. I took a step backward, bracing myself to receive this new antagonist. And then I looked further down and saw Miko! Unquestionably he, for there was no mistaking his giant figure. He was down on the camp ledge, running toward the foot of the stairs.

I thought of my revolver. I turned to try and find it. I was aware that the first of my a.s.sailants was at the stairhead. I swung back to see what this oncoming brigand was doing. He was on the summit: with a sailing leap he launched for me. I could have bounded away, but with a last look to locate the revolver, I braced myself for the shock.

The figure hit me. It was small and light in my clutching arms. I recall I saw that Miko was halfway up the stairs. I gripped my a.s.sailant. The audiphone contact brought a voice.

"Gregg, is it you?"

It was Anita!