"It's him, de silver fox!" gasped Sparrer under his breath, and with the realization that here before his very eyes was the king of the North American fur bearers, whose skin was worth a fabulous sum, according to what he had heard, he began to shake as with the ague. What if he could get him? A cold sweat broke out at the mere thought. There on the dam was what to him was nothing less than a fortune, and here was he shaking like an aspen leaf in the wind. The distance was too great for a shot at present, but perhaps the fox would come nearer, and then a true eye and steady nerves for just a matter of a few seconds and the prize might be his.

With a quick intake of breath he tried to get a grip on himself. He thought of the battles he had fought with bullies older and bigger than himself, and had won because he had kept his head in the heat of contest and had coolly taken advantage of every opening. But that was different. Then he was in action and it was easier to keep cool. Then, too, if he missed one blow there was a chance for another. It was this sitting still with the knowledge that there would be but one chance, and that this must be taken at just the right moment or be lost forever that upset him so. Then curiously enough the motto of the Boy Scouts flashed into his head—"Be prepared." It was like a tonic to his shaking nerves. Was not a Scout supposed to be prepared for all emergencies, and what was this but a form of emergency?

He stopped shaking. He lifted his rifle ever so little and found that it remained steady and motionless in his hands. "It ain't no fox. It's just a rabbit and youse can't miss it," he whispered over and over to himself, and experienced an odd sense of confidence. He was himself once more, the Sparrer of the streets, able to take care of himself and keep his head in any emergency; the Sparrer of the Blue Tortoise Patrol, noting the number of the fleeing machine at the time of the accident.

Meanwhile the fox was leisurely crossing the dam, stopping now and then to sniff at the snow or to test the wind. Fortunately what little there was of the latter was blowing toward the hidden watcher, a fact which Sparrer did not appreciate at the time. Had the wind been the other way the fox would have caught the hated man smell and vanished like a shadow. As it was his every move denoted complete lack of suspicion so far as a fox ever does lack this characteristic trait.

Sparrer was at complete loss as to what he should do. The temptation to crawl forward so as to get within easy range of the end of the dam was almost irresistible, but he realized that the first move on his part would be likely to attract the keen eyes of his quarry, and arouse his suspicions. Had the fringe of brush through which he was watching been leaved out it might have been possible to successfully make this move, but as it was his dark body against the white background could hardly fail of detection despite the screen of brush. He knew enough of animals to know that so long as he was motionless he would appear to be no more than a part of the log on which he sat, and wisely concluded to sit tight and await developments.

If the fox continued clear across the dam there was one point at which he would afford a clear shot through a little opening in the brush. It would be at long range, but the 22 was high powered, and if he could judge the distance aright and hold true there was a chance that he might kill. So far as he could see this appeared to be his only chance, and he prepared to take advantage of it. Inch by inch he wormed himself around on the log so as to face this opening. Then estimating the distance as best he could, a difficult matter across the snow, he set his sights accordingly, cocked the rifle and held it in readiness. All the time he kept whispering to himself, "Nothin' but a rabbit. Nothin' to git excited about. Youse has got a dead cinch. Youse can't miss." Somehow this trying to think of the fox as a rabbit helped wonderfully. Anybody could hit a rabbit.

The fox was trotting now with his nose to the snow. Sparrer was conscious of a hope so great that it was almost a prayer that the animal would stop when he reached the critical spot. It would be a hard enough shot at a motionless mark, but to hit a mark moving as swiftly as the fox was now going was more than he dared even dream of doing. The trot broke into a lope. Sparrer raised the rifle and sighted through the opening. It seemed to him that that swiftly moving form crossed the opening in one leap, a blur of black across his sights. Slowly he lowered his rifle. His chance was gone.

In the reaction that followed he realized how high his hopes had been. It seemed as if Fortune had but played with him, had put the prize almost within his grasp and then as he reached for it had snatched it away to tease and mock him. He could have cried with vexation and disappointment had he been of the weeping kind. As it was he swallowed a lump in his throat and leaned forward to peer through the brush for one last glimpse of the royal animal.

At the end of the dam the fox stopped. Sparrer could just make him out through the tangled screen of brush. For a moment he stood motionless. It seemed to the boy like adding insult to injury. Then with a long graceful leap he landed on the snow of the swamp. A sudden hope caused Sparrer to instinctively tighten his grip on the rifle and catch his breath. Perhaps the fox would come his way! If he should, well, he would at least find a true Scout—he would be prepared.

But the fox did not turn in his direction. Instead he kept straight on into the swamp as if he intended to cross it to the high land which made up to the hills beyond. Sparrer caught occasional glimpses of him through the trees. He crossed the trail by which Sparrer had come in, sniffed at it, looked up in Sparrer's direction suspiciously, it seemed to him, sniffed again and then trotted on as if the matter were of no present interest. The dry snow had not held the scent sufficiently to cause alarm.