Ross swayed against a guard, was fended off, and bounced against the wall as the man shouted words Ross could not understand. A determined roar from the leader brought a semblance of order, but it was plain that they had not been expecting this. Ross was hustled out of the room back to his cell. His guards were opening the cell door when a second shock was felt and he was thrust into safekeeping with no ceremony.

He half crouched against the questionable security of the wall, waiting through two more twisting earth waves, both of which were accompanied or preceded by dull sounds. Bombing! That last wrench was really bad. Ross found himself lying on the floor, feeling tremors rippling along the earth. His stomach knotted convulsively with a fear unlike any he had known before. It was as if the very security of the world had been jerked from under him.

But that last explosion—if it was an explosion—appeared to be the end. Ross sat up gingerly after several long moments during which no more shocks moved the floor and walls. A line of light marked the door, showing cracks where none had previously existed. Ross, not yet ready to try standing erect, was heading toward it on his hands and knees when a sharp noise behind him brought him to a stop.

There was no light to see by, but he was certain that the scrape of metal against metal sounded from the far side of the wall. He crawled back and put his ear to the surface. Now he heard not only that scraping, but an undercurrent of clicks, chippings....

Under his exploring hands the surface remained as smooth as ever, however. Then suddenly, perhaps a foot from his head, there sounded a rip of metal. The wall was being holed from the other side! Ross caught a flicker of very weak light, and moving in it was the point of a tool pulling at the smooth surface of the wall. It broke away with a brittle sound, and a hand holding a light reached through the aperture.

Ross wondered if he should catch that wrist, but the hope that the digger might just possibly be an ally kept him motionless. After the hand with the light whipped back beyond the wall, a wide section gave away and a hunched figure crawled through, followed by a second. In the limited glow he saw the first tunneler clearly enough.

"Assha!"

Ross was unprepared for what followed his cry. The lean brown man moved with a panther\'s striking speed, and Ross was forced back. A hand like a steel ring on his throat shut the breath away from his bursting lungs; the other\'s muscular body held him flat in spite of his struggles. The light of the small flash glowed inches beyond his eyes as he fought to fill his lungs. Then the hand on his throat was gone and he gasped, a little dizzy.

"Murdock! What are you doing—?" Ashe\'s clipped voice was muffled by another sudden explosion. This time the earth tremors not only hurled them from their feet, but seemed to run along the walls and across the ceiling. Ross, burying his face in the crook of his arm, could not rid himself of the fear that the building was being slowly twisted into scrap. When the shock was over he raised his head.

"What\'s going on?" He heard McNeil ask.

"Attack." That was Ashe. "But why, and by whom—don\'t ask me! You are a prisoner, I suppose, Murdock?"

"Yes, sir." Ross was glad that his voice sounded normal enough.

He heard someone sigh and guessed it was McNeil. "Another digging party." There was tired disgust in that.

"I don\'t understand," Ross appealed to that section of the dark where Ashe had been. "Have you been here all the time? Are you trying to dig your way out? I don\'t see how you can cut out of this glacier that we\'re parked under——"

"Glacier!" Ashe\'s exclamation was as explosive as the tremors. "So we\'re inside a glacier! That explains it. Yes, we\'ve been here—"

"On ice!" McNeil commented and then laughed. "Glacier—ice—that\'s right, isn\'t it?"

"We\'re collaborating," Ashe continued. "Supplying our dear friends with a lot of information they already have and some flights of fancy they never dreamed about. However, they didn\'t know we had a few surprise packets of our own strewn about. It\'s amazing what the boys back at the project can pack away in a belt, or between layers of hide in a boot. So we\'ve been engaged in some research of our own——"

"But I didn\'t have any escape gadgets." Ross was struck by the unfairness of that.

"No," Ashe agreed, his voice even and cold, "they are not entrusted to first-run men. You might slip up and use them at the wrong moment. However, you appear to have done fairly well...."

The heat of Ross\'s rising anger was chilled by the noise which cracked over their heads, ground to them through the walls, flattened and threatened them. He had thought those first shocks the end of this ice burrow and the world; he knew that this one was.

And the silence that followed was as threatening in its way as the clamor had been. Then there was a shout, a shriek. The space of light near the cell door was widening as that barrier, broken from its lock, swung open slowly. The fear of being trapped sent the men in that direction.

"Out!"

Ross was ready enough to respond to that order, but they were stopped by a crackle of sound that could be only one thing—rapid-fire guns. Somewhere in this warren a fight was in progress. Ross, remembering the arrogant face of the bald ship\'s officer, wondered if this was not an attack in force—the aliens against the looting Reds. If so, would the ship people distinguish between those found here. He feared not.

The room outside was clear, but not for long. As they lay watching, two men backed in, then whirled to stare at each other. A voice roared from beyond as if ordering them back to some post. One of them took a step forward in reluctant obedience, but the other grabbed his arm and pulled him away. They turned to run, and an automatic cracked.

The man nearest Ross gave a queer little cough and folded forward to his knees, sprawling on his face. His companion stared at him wildly for an instant, and then skidded into the passage beyond, escaping by inches a shot which clipped the door as he lunged through it.

No one followed, for outside there was a crescendo of noise—shouting, cries of pain, an unidentifiable hissing. Ashe darted into the room, taking cover by the body. Then he came back, the fellow\'s gun in his hand, and with a jerk of his head summoned the other two. He motioned them on in a direction away from the sounds of battle.

"I don\'t get all this," McNeil commented as they reached the next passage. "What\'s going on? Mutiny? Or have our boys gotten through?"

"It must be the ship people," Ross answered.

"What ship?" Ashe caught him up swiftly.

"The big one the Reds have been looting——"

"Ship?" echoed McNeil. "And where did you get that rig?" In the bright light it was easy to see Ross\'s alien dress. McNeil fingered the elastic material wonderingly.

"From the ship," Ross returned impatiently. "But if the ship people are attacking, I don\'t think they will notice any difference between us and the Reds...."

There was a burst of ear-splitting sound. For the third time Ross was thrown from his feet. This time the burrow lights flickered, dimmed, and went out.

"Oh, fine," commented McNeil bitterly out of the dark. "I never did care for blindman\'s buff."

"The transfer plate—" Ross clung to his own plan of escape—"if we can reach that—"

The light which had served Ashe and McNeil in their tunneling clicked on. Since the earth shocks appeared to be over for a while, they moved on, with Ashe in the lead and McNeil bringing up the rear. Ross hoped Ashe knew the way. The sound of fighting had died out, so one side or the other must have gained the victory. They might have only a few moments left to pass undetected.

Ross\'s sense of direction was fairly acute, but he could not have gone so unerringly to what he sought as Ashe did. Only he did not lead them to the room with the glowing plate, and Ross stifled a protest as they came instead to a small record room.

On a table were three spools of tape which Ashe caught up avidly, thrusting two in the front of his baggy tunic, passing the third to McNeil. Then he sped about trying the cupboards on the walls, but all were locked. His hand falling from the last latch, Ashe came back to the door where Ross waited.

"To the plate!" Ross urged.

Ashe surveyed the cupboards once more regretfully. "If we could have just ten minutes here——"

McNeil snorted. "Listen, you may yearn to be the filling in an ice sandwich, but I don\'t! Another shock and we\'ll be buried so deep even a drill couldn\'t find us. Let\'s get out now. The kid is right about that—if we still can."

Once more Ashe took the lead and they wove through ghostly rooms to what must have been the heart of the post—the transfer point. To Ross\'s unvoiced relief the plate was glowing. He had been nagged by the fear that when the lights blew out the transfer plate might also have been affected. He jumped for the plate.

Neither Ashe nor McNeil wasted time in joining him there. As they clung together there was a cry from behind them, underlined by a shot. Ross, feeling Ashe sag against him, caught him in his arms. By the reflected glow of the plate he s............