"Yes, I like that idea," agreed Dick, "for they may pass to the right or the left, and then the one on that side would get a fair shot. Remember, Roger, take your stand, and after that be sure not to move. If you did, you might cause the deer to sheer off, and us to lose our breakfast." Mayhew stood still, while Dick hurried off to the right, and Roger took to the left, though neither of them went more than a hundred feet. In fact the clamor was drawing so close now that at any minute they might expect to catch their first glimpse of the chase. All of them stood like statues, their eyes riveted on the quarter whence the wild yelps arose. They could hear the rush of something moving swiftly through the brush, and the sound grew constantly in volume. Suddenly a running animal came into view, a lordly elk, Dick instantly discovered, and a buck at that. From the manner in which he ran it was evident that either the elk was lame, or else had been chased so far that he was becoming exhausted. Close at his heels came four ferocious gray wolves. They were spinning along at top speed, their red tongues hanging from between their open jaws, where the white teeth gleamed cruelly. The boys had run across another species of wolf since leaving their old hunting grounds near the mouth of the Missouri. This was the smaller prairie wolf, an animal akin to the coyote. But they saw at a glance that these were the large, gray timber wolves, more to be feared than any other species, especially if they were half starved. The poor exhausted elk was apparently on his last legs. He seemed to realize this fact, too, for, as the boys waited impatiently for the chase to reach them, they saw him stumble, and fall to his knees, as he turned to face his foes. Instantly the pack leaped upon him. One was sent whirling through the air, torn by the sharp antlers of the buck; but the others quickly had the gallant elk down on the ground. "We must chase them off!" cried Dick, starting on the run toward the spot. Roger and the guide followed, so that the three of them were running as fast as they could in the direction of the tragedy. They knew how quickly wolves can tear the carcass of their quarry, and realized that, if they hoped to save a portion of the elk's best quarters, they would have to hasten. The wolves quickly discovered their presence; but they were also very loath to abandon their feast. Indeed, it seemed for a moment as though they meant to dispute the right of the newcomers to the game their cunning and ferocity had pulled down, for they crouched there, and growled, and bared their teeth as the trio approached. "Be ready to defend yourself, Roger!" called out Dick, "but do not shoot unless it is absolutely necessary!"