of twenty by a similar sweep in the opposite direction. After this pattern had been repeated for six turns, Ross found it difficult to guess whether they had ever returned to their first course. When Kurt stopped counting he asked, "Why the dance pattern?"
"Would you rather be scattered in little pieces all over the landscape?" the other snapped. "The base doesn't need fences two miles high to keep us in, or others out; they take other precautions. You should thank fortune we got through that first mine field without blowing...."
Ross swallowed, but he refused to let Kurt know that he was rattled. "So it isn't as easy to get away as you said?"
"Shut up!" Kurt began counting again, and Ross had some cold apprehensive moments in which to reflect upon the folly of quick decisions and wonder bleakly why he had not thought things through before he leaped.
Again they sketched a weaving pattern in the snow, but this time the arcs formed acute angles. Ross glanced now and then at the intent man at the wheel. How had Kurt managed to memorize this route? His urge to escape the base must certainly be a strong one.
Back and forth they crawled, gaining only a few yards in each of those angled strikes to right or left.
"Good thing these cats are atomic powered," Kurt commented during one of the intervals between mine fields. "We'd run out of fuel otherwise."
Ross fought down the impulse to move his feet away from any possible contact point with the engine. These machines must be safe to ride in, but the bogy of radiation was frightening. Luckily, Kurt was now back to a straight track, with no more weaving.
"We are out!" Kurt said with exultation. But he added no more than just the reassurance of their escape.
The cat crawled on. To Ross's eyes there was no trail to follow, no guideposts, yet Kurt steered ahead with confidence. A little later he pulled to a stop and said to Ross, "We have to drive turn and turn about—your turn."
Ross was dubious. "Well, I can drive a car—but this——"
"Is fool proof." Kurt caught him up. "The worst was getting through the mine fields, and we are out of that now. See here—" his hand made a shadow on the lighted instrument panel, "this will keep you straight. If you can steer a car, you can steer this. Watch!" He started up again and once more swung the cat to the left.
A light on the panel began to blink at a rate which increased rapidly as they veered farther away from their original course.
"See? You keep that light steady, and you are on course. If it begins to blink, you cast about until it steadies again. Simple enough for a baby. Take over and see."
It was hard to change places in the sealed cabin of the cat, but they were successful, and Ross took the wheel gingerly. Following Kurt's directions, he started ahead, his eyes focused on the light rather than the white expanse before him. And after a few minutes of strain he caught the hang of it. As Kurt had promised, it was very simple. After watching him for a while, his instructor gave a grunt of satisfaction and settled down for a nap.
Once the first excitement of driving the cat wore off, the operation tended to become monotonous. Ross caught himself yawning, but he kept at his post with dogged stubbornness. This had been Kurt's game all the way through—so far—and he was certainly not going to resign his first chance to show that he could be of use also. If there had only been some break in the eternal snow, some passing light or goal to be seen ahead, it would not have been so bad. Finally, every now and then, Ross had to jiggle off course just enough so that the warning blink of light would alert him and keep him from falling asleep. He was unaware that Kurt had awakened during one of those maneuvers until the other spoke. "Your own private alarm clock, Murdock? Okay, I do not quarrel with anyone who uses his head. But you had better get some shut-eye, or we will not keep rolling."
Ross was too tired to protest. They changed places, and he curled up as best he could on his small share of seat. Only now that he was free to sleep, he realized he no longer wanted to. Kurt must have thought Ross had fallen asleep, for after perhaps two miles of steady grinding along, he moved cautiously behind the wheel. Ross saw by the trace of light from the instrument panel that his companion was digging into the breast of his parka to bring out a small object which he held against the wheel of the cat with one hand, while with the other he tapped out an irregular rhythm.
To Ross the action made no sense. But he did not miss the other's sigh of relief as he restored his treasure to hiding once more, as if some difficult task was now behind him. Shortly afterward the cat ground to a stop, and Ross sat up, rubbing his eyes. "What's the matter? Engine trouble?"
Kurt had folded his arms across the wheel. "No. It is just that we are to wait here——"
"Wait? For what? Kelgarries to come along and pick us up?"
Kurt laughed. "The major? How I wish that he would arrive presently. What a surprise he would receive! Not two little mice to be put back into their cages, but the tiger cat, all claws and fangs!"
Ross sat up straighter. This now had the bad smell of a frame, a frame with himself planted right in the middle. He figured out the possibilities and came up with an answer which would smear Ross Murdock all over any map. If Kurt were waiting to meet friends out here, they could only be of one brand.
For most of his short life Ross had been engaged in a private war against the restrictions imposed upon him by a set of legal rules to which something within him would not conform. And he had, during those same years filled with attacks, retreats, and strategic maneuvering, formulated a code of rules by which to play his dangerous game. He had not murdered, and he would never follow the path Kurt took. To one who was supremely impatient of restraint, the methods and aims of Kurt's employers were not only impossibly fantastic and illogical—they were to be opposed to the last ounce of any man's energy.
"Your friends late?" He tried to sound casual.
"Not yet, and if you now plan to play the hero, Murdock, think better of it!" Kurt's tone held the crack of an order—that note Ross had so much disliked in the major's voice. "This is an operation which has been most carefully planned and upon which a great deal depends. No one shall spoil it for us now——"
"The Reds planted you on the project, eh?" Ross wanted to keep the other talking to give himself a chance to think. And this was one time he had to think, clearly and with speed.
"There is no need for me to tell you the sad tale of my life, Murdock. And you would doubtless find much of it boring. If you wish to continue to live—for a while, at least—you will remain quiet and do as you are told."
Kurt must be armed, for he would not be so confident unless he had a weapon he could now turn on Ross. On the other hand, if what Ross guessed were true, this was the time to play the hero—when there was only Kurt to handle. Better to be a dead hero than a live captive in the hands of Kurt's dear friends across the pole.
Without warning, Ross threw his body to the left, striving to pin Kurt against the driver's side of the cabin, his hands clawing at the fur ruff bordering the other's hood, trying for a throat hold. Perhaps it was Kurt's over-confidence which betrayed him and left him open to a surprise attack. He struggled hard to bring up his arm, but both his weight and Ross's held him tight. Ross caught at his wrist, noticing a gleam of metal.
They threshed about, the bulkiness of the fur clothing hampering them. Ross wondered fleetingly why the other had not made sure of him earlier. As it was he fought with all his vigor to keep Kurt immobile, to try and knock him out with a lucky blow.
In
