It was partly this curiosity which piqued his interest in her. Then too he recognized in her a freak type,—as he himself was a freak. Each stood for the first generation of a new breed, the equally divided parental strains not yet dulled and blended by further crosses, and so each of them recognized something outstanding and unusual in the other.

At first their knowledge was confined to what each learned of the other by ear alone, unaided by the testimony of other senses. Breed never once caught sight of her, and the trail scent which she left behind told him little except that she was half coyote and half dog, as he already knew.

For a month he answered her howls, his curiosity unassuaged. And as Breed puzzled over Shady's voice, so Collins puzzled over Breed's. Collins had heard him howl more than a hundred times and knew that there was some slight difference between his voice and the pure wolf note. He had made a close study of animal sounds and knew them well. He knew Shady's voice from that of other coyotes. Her variations were less sharply defined; more sustained than the bewildering staccato of the coyote and with a slightly coarser tone. Collins knew that he should be able to detect that peculiarity in Breed's howl,—a difference which he felt was there but could not place. There were times when the solution rose to the very surface of his mind and struggled for interpretation into readable thought, but always it eluded him in the end.

Shady came to listen for Breed's voice among the multitude of other sounds, and in some small measure she felt acquainted with the yellow wolf. She missed his voice on those nights when he hunted in some far corner of his range and the familiar cry failed to reach her.

This sense of familiarity led her at last to wait for a sight of him. Breed traveled one night toward the howl which always had the power to draw him, and he suddenly saw Shady fifty yards ahead. She would permit of no nearer approach, fleeing before him as he came on, stopping when Breed stopped, but always keeping that fifty-yard gap between. Every night for a week Breed strove to narrow the breach, but without success; but Shady's doubts were wearing down before his constant advances and she found no menace in his actions. She eventually allowed Breed to draw near and they viewed one another at a distance of ten yards. Their course through the sage was a series of eccentric loops as each circled repeatedly downwind to catch the other's scent.

Then their relations were reversed, Breed the retiring one, Shady the aggressive. There was the scent of the stables, a horsy smell that clung to Shady and which Breed could not understand. There seemed too some vague taint of man about her which held him back. Shady grew bolder in the face of his timidity, and Breed's new-found suspicion eventually waned before her friendly insistence. Their friendship once established they romped together night after night.

Shady was puzzled over the fact that this new playmate invariably left her early in the night. These meetings took place before Breed raised his voice to summon the coyote pack for the nightly hunt. He would break off in the middle of a race and send out the call, then leave the wondering Shady to her own devices for the rest of the night.

His curiosity satisfied, Breed answered her invitations less often and she saw him only at infrequent intervals; and there was a reason for this flagging interest. Wolves and coyotes mate for life, or till one or the other of a pair falls victim to the wiles of man. When once a pair is broken the survivor will not take unto himself another mate till the next running time of wolves. There were pairs of coyotes running together in Breed's pack; there were also single she-coyotes and single dogs, but while the mated ones were as devoted as ever before, these single ones had only a general interest in the others, their attitude uninfluenced by the lure of sex. And Shady, hampered by her relations with man and so unable to follow Breed's leadership at will, exercised less influence over him than either Peg or Cripp.

Breed killed abundantly, the coyotes picking the last morsel of each victim before dawn. Often he killed twice in one night. Word had spread that a breed-wolf had turned up on the range and was running with the coyotes. Private rewards were added to the State bounty till a total of two hundred dollars was posted as the price on his scalp. Every rider kept a sharp lookout for the breed; yet so great was his caution that except for that first day of his return, when Collins had seen him on the rims, no man had set eyes on the yellow wolf.

Breed's watchfulness for traps and poison baits had waned from the fact that he found none of either on the range, and he now gave them scarce a thought. On the other hand his caution to avoid horsemen was quickened from seeing many of them and his vigilance in that particular was never relaxed. He chose his beds with care and he slept so lightly that the least sound penetrated his consciousness and carried its message to his brain. The shrill cachinnations of a prairie dog, the shriek of a burrowing owl or the bawling of a range cow; any of these usual sounds of the open failed to rouse him; but invariably he knew when a man was dangerously near. If the menace was upwind and within reasonable distance, his nose detected it. At times the creak of saddle leather reached his ears or the sound of the horse's hoofs warned him.