"This day's about done," he went on. "Have you any objections to me camping with you here?"
Not a cowpuncher within five hundred miles but would be glad of such redoubted company. They went back to Calder's horse.
"We can start for my clearing," said Dan. "Bart'll bring the hoss. Fetch him in."
The wolf took the dangling bridle reins and led on the cowpony. Calder observed his performance with starting eyes, but he was averse to asking questions. In a few moments they came out on a small open space. The ground was covered with a quantity of dried bunch grass which a glorious black stallion was cropping. Now he tossed up his head so that some of his long mane fell forward between his ears and at sight of Calder his ears dropped back and his eyes blazed, but when Dan stepped from the willows the ears came forward again with a whinny of greeting. Calder watched the beautiful animal with all the enthusiasm of an expert horseman. Satan was untethered; the saddle and bridle lay in a corner of the clearing; evidently the horse was a pet and would not leave its master. He spoke gently and stepped forward to caress the velvet shining neck, but Satan snorted and started away, trembling with excitement.
"How can you keep such a wild fellow as this without hobbling him?" asked Calder.
"He ain't wild," said Dan.
"Why, he won't let me put a hand on him."
"Yes, he will. Steady, Satan!"
The stallion stood motionless with the veritable fires of hell in his eyes as Calder approached. The latter stopped.
"Not for me," he said. "I'd rather rub the moustache of the lion in the zoo than touch that black devil!"
Bart at that moment led in the cowpony and Calder started to remove the saddle. He had scarcely done so and hobbled his horse when he was startled by a tremendous snarling and snorting. He turned to see the stallion plunging hither and thither, striking with his fore-hooves, while around him, darting in and out under the driving feet, sprang the great black wolf, his teeth clashing like steel on steel. In another moment they might sink in the throat of the horse! Calder, with an exclamation of horror, whipped out his revolver, but checked himself at the very instant of firing. The master of the two animals stood with arms folded, actually smiling upon the fight!
"For God's sake!" cried the marshal. "Shoot the damned wolf, man, or he'll have your horse by the throat!"
"Leave 'em be," said Dan, without turning his head. "Satan an' Black Bart ain't got any other dogs an' hosses to run around with. They's jest playing a little by way of exercise."
Calder stood agape before what seemed the incarnate fury of the pair. Then he noticed that those snapping fangs, however close they came, always missed the flesh of the stallion, and the driving hoofs never actually endangered the leaping wolf.
"Stop 'em!" he cried at last. "It makes me nervous to watch that sort of play. It isn't natural!"
"All right," said Dan. "Stop it, boys."
He had not raised his voice, but they ceased their wild gambols instantly, the stallion, with head thrown high and arched tail and heaving sides, while the wolf, with lolling red tongue, strolled calmly towards his master.
The latter paid no further attention to them, but set about kindling a small fire over which to cook supper. Calder joined him. The marshal's mind was too full for speech, but now and again he turned a long glance of wonder upon the stallion or Black Bart. In the same silence they sat under the last light of the sunset and ate their supper. Calder, with head bent, pondered over the man of mystery and his two tamed animals. Tamed? Not one of the three was tamed, the man least of all.
He saw Dan pause from his eating to stare with wide, vacant eyes among the trees. The wolf-dog approached, looked up in his master's face, whined softly, and getting no response went back to his place and lay down, his eyes never moving from Dan. Still he stared among the trees. The gloom deepened, and he smiled faintly. He began to whistle, a low, melancholy strain so soft that it blended with the growing hush of the night. Calder listened, wholly overawed. That weird music seemed an interpretation of the vast spaces of the mountains, of the pitiless desert, of the limitless silences, and the whistler was an understanding part of the whole.
He became aware of a black shadow behind the musician. It was Satan, who rested his nose on the shoulder of the master. Without ceasing his whistling Dan raised a hand, touched the small muzzle, and Satan went at once to a side of the clearing and lay down. It was almost as if the two had said good-night! Calder could stand it no longer.
"Dan, I've got to talk to you," he began.
The whistling ceased; the wide brown eyes turned to him.
"Fire away—partner."
Ay, they had eaten together by the same fire—they had watched the coming of the night—they had shaken hands in friendship—they were partners. He knew deep in his heart that no human being could ever be the actual comrade of this man. This lord of the voiceless desert needed no human companionship; yet as the marshal glanced from the black shadow of Satan to the gleaming eyes of Bart, and then to the visionary face of Barry, he felt that he had been admitted by Whistling Dan into the mysterious company. The thought stirred him deeply. It was as if he had made an alliance with the wandering wind. Why he had been accepted he could not dream, but he had heard the word "partner" and he knew it was meant. After all, stranger things than this happen in the mountain-desert, where man is greater and convention less. A single word has been known to estrange lifelong comrades; a single evening beside a camp- fire has changed foes to partners. Calder drew his mind back to business with a great effort.
"There's one thing you don't know about Jim Silent. A reward of ten thousand dollars lies on his head. The notices aren't posted yet."
Whistling Dan shrugged his shoulders.
"I ain't after money," he answered.
Calder frowned. He did not appreciate a bluff.
"Look here," he said, "if we kill him, because no power on earth will take him alive—we'll split the money."
"If you lay a hand on him," said Dan, without emotion, "we won't be friends no longer, I figger."
Calder stared.
"If you don't want to get him," he said, "why in God's name are you trailing him this way?"
Dan touched his lips. "He hit me with his fist."
He paused, and spoke again with a drawling voice that gave his words an uncanny effect.
"My blood went down from my mouth to my chin. I tasted it. Till I get him there ain't no way of me forgettin' him."
His eyes lighted with that ominous gleam.
"That's why no other man c'n put a hand on him. He's laid out all for me. Understand?"
The ring of the question echoed for a moment through Calder's mind.
"I certainly do," he said with profound conviction, "and I'll never forget it." He decided on a change of tactics. "But there are other men with Jim Silent and those men will fight to keep you from getting to him."
"I'm sorry for 'em," said Dan gently. "I ain't got nothin' agin any one except the big man."
Calder took a long breath.
"Don't you see," he explained carefully, "if you shoot one of these men you are simply a murderer who must be apprehended by the law and punished."
"It makes it bad for me, doesn't it?" said Dan. "An' I hope I won't have to hurt more'n one or two of 'em. You see,"—he leaned forward seriously towards Calder—"I'd only shoot for their arms or their legs. I wouldn't spoil them altogether."
Calder threw up his hands in despair. Black Bart snarled at the gesture.
"I can't listen no more," said Dan. "I got to start explorin' the willows pretty soon."
"In the dark?" exclaimed Calder.