Once Buck went over, and the whole circle of sixty dogs started up; but he recovered himself, almost in mid air, and the circle sank down again and waited.
But Buck possessed a quality that made for greatness--imagination.

He fought by instinct, but he could fight by head as well.

He rushed, as though attempting the old shoulder trick, but at the last instant swept low to the snow and in.

His teeth closed on Spitz's left fore leg.

There was a crunch of breaking bone, and the white dog faced him on three legs.