Thornton knelt down by Buck's side. He took his head in his hands and rested cheek on cheek. He did not playfully shake him, as was his wont, or murmur soft love curses; but he whispered in his ear. "As you love me, Buck. As you love me," was what he whispered. Buck whined with suppressed eagerness.
The crowd was watching curiously. The affair was growing mysterious. It seemed like a conjuration. As Thornton got to his feet, Buck seized his mittened hand between his jaws, pressing in with his teeth and releasing slowly, half-reluctantly. It was the answer, in terms, not of speech, but of love. Thornton stepped well back.
"Now, Buck," he said.
Buck tightened the traces, then slacked them for a matter of several inches. It was the way he had learned.
"Gee!" Thornton's voice rang out, sharp in the tense silence.
Buck swung to the right, ending the movement in a plunge that took up the slack and with a sudden jerk arrested his one hundred and fifty pounds. The load quivered, and from under the runners arose a crisp crackling.
"Haw!" Thornton commanded.
Buck duplicated the maneuver, this time to the left. The crackling turned into a snapping, the sled pivoting and the runners slipping and grating several inches to the side. The sled was broken out. Men were holding their breaths, intensely unconscious of the fact.
Thornton's command cracked out like a pistol shot. Buck threw himself forward, tightening the traces with a jarring lunge. His whole body was gathered compactly together in the tremendous effort, the muscles writhing and knotting like live things under the silky fur. His great chest was low to the ground, his head forward and down, while his feet were flying like mad, the claws scarring the hard-packed snow in parallel grooves. The sled swayed and trembled, half-started forward. One of his feet slipped, and one man groaned aloud. The sled lurched ahead in what appeared a rapid succession of jerks, though it never really came to a dead stop again . . . half an inch . . . an inch . . . two inches . . . The jerks perceptibly diminished; as the sled gained momentum, he caught them up, till it was moving steadily along.