To Buck’s surprise these dogs manifested no jealousy toward him. They seemed to share the kindliness and largeness of John Thornton. As Buck grew stronger they enticed him into all sorts of ridiculous games, in which Thornton himself could not forbear to join; and in this fashion Buck romped through his convalescence and into a new existence. Love, genuine passionate love, was his for the first time. This he had never experienced at Judge Miller’s down in the sun-kissed Santa Clara Valley. With the Judge’s son, hunting and tramping, it had been a working partnership; with the Judge’s grandsons, a sort of pompous guardianship; and with the Judge himself a stately and dignified friendship. But love that was feverish and burning, that was adoration, that was madness, it had taken John Thornton to arouse.

This man had saved his life, which was something; but, further, he was the ideal master. Other men saw to the welfare of their dogs from a sense of duty and business expediency; he saw to the welfare of his as if they were his own children, because he could not help it. And he saw further. He never forgot a kindly greeting or a cheering word, and to sit down for a long talk with them (’gas’ he called it) was as much his delight as theirs. He had a way of taking Buck’s head roughly between his hands, and resting his own head upon Buck’s, of shaking him back and forth, the while calling him ill names that to Buck were love names. Buck knew no greater joy than that rough embrace and the sound of murmured oaths, and at each jerk back and forth it seemed that his heart would be shaken out of his body so great was its ecstasy. And when, released, he sprang to his feet, his mouth laughing, his eyes eloquent, his throat vibrant with unuttered sounds, and in that fashion remained without movement, Joh Thornton would reverently exclaim, ‘God, you can all but speak!’

Buck had a trick of love expression that was akin to hurt. He would often seize Thornton’s hand in his mouth and close so fiercely that the flesh bore impress of his teeth for some time afterwards. And as Buck understood the oaths to be love words, so the man understood this feigned bite for a caress.

For the most part, however, Buck’s love was expressed in adoration. While he went wild with happiness when Thornton touched him or spoke to him, he did not seek these tokens. Unlike Skeet, who was wont to shove her nose under Thornton’s hand and nudge and nudge till petted, or Nig, who would stalk up and rest his great head on Thornton’s knee, Buck was content to adore at a distance. He would lie by the hour, eager, alert, at Thornton’s feet looking up into his face, dwelling upon it, studying it, following with keenest interest each fleeting expression, every movement or change of feature. Or, as chance might have it, he would lie father away, to the side or rear, watching the outlines of the man and the occasional movements of his body. And often, such was the communion in which they lived, the strength of Buck’s gaze would draw John Thornton’s head around, and he would return the gaze, without speech, his heart shining out of his eyes as Buck’s heart shone out.

For a long time after his rescue, Buck did not like Thornton to get out of his sight. From the moment he left the tent to when he entered it again, Buck would follow at his heels. His transient masters since he had come into the Northland had bred in him a fear that no master could be permanent. He was afraid that Thornton would pass out of his life as Perrault and François and the Scotch half-breed had passed out. Even in the night, in his dreams, he was haunted by this fear. At such times he would shake off sleep and creep through the chill to the flap of the tent, where he would stand and listen to the sound of his master’s breathing.

But in spite of this great love he bore John Thornton, which seemed to bespeak the soft civilizing influence, the strain of the primitive, which the Northland had aroused in him, remained alive and active. Faithfulness and devotion, things born of fire and roof, were his, yet he retained his wildness and wiliness. He was a thing of the wild, come in from the wild to sit by John Thornton’s fire, rather than a dog of the soft Southland stamped with the marks of generations of civilization. Because of his very great love, he could not steal from this man, but from any man, in any other camp, he did not hesitate an instant; while the cunning with which he stole enabled him to escape detection.