Instead of continuing in a direct course for the hills the fox now began to quarter the ground very much as a bird dog does in quest of quail. In short runs from side to side he advanced deeper into the swamp, investigating every bush and clump of trees in his course, pausing now and then with head raised and ears cocked forward to listen, then running on again. Gradually it dawned on Sparrer that Reynard had crossed the dam with a definite purpose. He had come over to the swamp with the same object in view that had brought Sparrer there—to hunt rabbits.
The sharp contrast between the snow and the black coat of the fox made it possible for Sparrer to follow the animal's movements at a distance which under ordinary conditions would have been impossible. He had turned and was working up wind, continually stopping to carefully test the light air in the hope of scenting a hare. His course was now directly away from Sparrer toward the lower end of the swamp. The boy could get only an occasional glimpse of him and presently lost him altogether. Once more bitter disappointment rankled in his heart. What should he do now? Should he remain where he was, or should he move on? How he wished that he knew more about hunting and the ways of animals, black foxes in particular. What would Pat do were he in his place? Would he give up? Somehow he couldn't picture Pat as giving up without further effort to capture so great a prize.
"He'd do somethin', but what?" Sparrer scowled in labored thought. The fox was somewhere between him and the cabin. Should he turn back on the chance that he would jump the animal somewhere on the way and get a running shot? "No chance," he decided, remembering the clack of his shoes in walking. "He'd hear me a mile." He slipped his shoes off and rose to his feet. The crust bore him, for he was a light weight. Then he took a comprehensive survey of his surroundings. There was one other chance. The fox might return. He would soon reach the lower edge of the swamp and failing to make a kill might decide to try his luck down wind in the main body of the swamp.
The more Sparrer thought of this the more likely it seemed. Perhaps unconsciously he was allowing hope to father the idea. Anyway it raised his spirits wonderfully. In such an event he must be ready. Once more he looked the ground over carefully. His present position was on the outer edge of the swamp. He quickly appreciated that if he were farther in his chances would be doubled in case the fox returned. If he remained where he was the fox might pass so far toward the other side that he would not even see him, to say nothing of getting a shot, whereas if he could find a place farther in which would command a fairly open view in all directions the chances of the animal passing unseen would be greatly reduced. Slightly back of his present position and a good rifle shot in to the swamp he noted a small mound crowned by a clump of young birches. He decided to take his stand there and await developments. Silently but vigorously he swung his arms to restore circulation, then picking up his rifle and shoes he made his way quickly toward the new stand, taking the utmost care not to snap a twig or make the least noise.
As he entered the clump of birches a white form leaped out from the lower side, ran ten or twelve yards and sat up, looking back with eyes in which fear and curiosity were strangely blended. It was a hare, or so-called snow-shoe rabbit, and a big one. Slowly and carefully Sparrer put down his shoes and then straightened up and raised his rifle. Silently he brought the sights to bear on the motionless white form. His finger was already on the trigger when he remembered the fox. A shot now would effectually put an end to any possibility of getting the prince of fur bearers that day, and what was a rabbit compared with the latter?
Oddly enough the old adage "A bird in the hand is worth two in the bush" popped into his head, but this time the one in the bush was of so much greater value that he promptly decided to let the one in hand go. At that distance he couldn't miss, for he had readjusted the sights and he had but to press the trigger to put an end to bunny. A little sigh escaped him as he lowered the rifle. The lowering of that rifle was the hardest thing he had done for a long time. It required considerable power of self-restraint. The fox might not come back, and if he did might not offer a shot, or he might miss him. Then the chances were that he would have to return to the cabin empty handed.
With the lowering of the rifle the rabbit dropped to a crouch, thumped the snow smartly, and then slowly hopped away to a point twenty yards distant in the direction in which the fox had gone, and there crouched under a bush, an inconspicuous lump of white. Sparrer noted with satisfaction that she was still within good range, and made up his mind that if there were no signs of the fox within fifteen or twenty minutes and the rabbit still remained where she was he would shoot.
Now be it known that the thump of a rabbit can be heard a long distance. It was so unexpected and so loud that it fairly startled Sparrer, who was wholly unfamiliar with this method of rabbit signaling. The ground is an excellent transmitter of sound and the heavy snow crust was hardly less effective. Other ears than Sparrer's heard, and for them that signal was pregnant with meaning and possibilities. Not two minutes later Sparrer caught sight of a black spot moving swiftly in his direction. It was the fox.
As he drew nearer he moved more slowly and with characteristic cunning and caution. Every few steps he paused to listen and to look sharply under every tree and bush. He no longer tested the air as when Sparrer had last seen him, for now he was working down wind and must trust to eyes and ears rather than to his nose. But he was no less thorough in the way in which he covered the ground. Back and forth across Sparrer's field of vision he wove, investigating every likely hiding-place, approaching each with infinite care, tense, alert, the picture of eagerness, prepared to spring at the first move of his quarry.
As he approached Sparrer could read in every move and attitude of the black hunter expectancy and confidence. That he knew to a reasonable certainty the approximate location from which that signal thump had sounded was clearly evident. That he also knew that the rabbit might have, and very likely had, moved since thumping was also clear and he was taking no chance of over-running his game. If he kept on as he was coming he would be within shooting distance within a few minutes. Inch by inch Sparrer raised the rifle and then, hardly daring to breathe, tense, as motionless as the trees among which he stood, he waited.