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.