During the day Bridewell attempted to probe the past history of his hired man, expecting a story as big as the body of the man, but Bull was discreetly vague, for he had no wish to reveal his connection with Pete Reeve; and if he left out Reeve, he felt that there was nothing in his life worth talking about.  Many a time he wondered what the little gunfighter was doing, and what trail he was riding now.  A dangerous trail, he doubted not, and a lawless trail, he greatly feared.  But someday he might be able to find the terrible little man and bring him back to a truer place in society.

That night he began again the long, quiet struggle with Diablo; and before he ended, Diablo had gathered some of the dried fruit from the palm of his hand with a sensitive, trembling pair of lips.  And he had come back for more, and more.  Yet it was not until the next night that Bull ventured inside the bars of the corral and sat cross-legged on the ground, with a vague feeling that Diablo would be less alarmed if his visitor bulked less large.

Inside the bars he seemed an entirely new proposition to the stallion.  The big black kept discreetly on the far side of the corral with much snorting and stamping, and it was not until the next evening that he ventured to approach the man.  Still another day passed before Bull was allowed to stand and touch the neck of the black; and that, it seemed to him, was the greatest forward step toward the conquest.

It was terribly slow work, and in the meantime the skeleton frame of the barn was fast rising.  Would he accomplish his purpose by the time the barn was completed and Bridewell no longer had a use for him?  Or would Hal Dunbar arrive before that appointed time?  That night, however, another portentous event happened.  Waking in the night, Bull heard a sound of deep, regular breathing close to him, and, turning on his side, he saw that Diablo had lain down as close to him as the corral fence would allow, and there he slept, panther-black, sleek in the starlight.  Bull stretched out his hand.  The head of the stallion jerked up, but a moment later he carelessly sniffed the extended fingers and resumed his position of repose.  And the heart of Bull Hunter swelled with triumph.

That event gave him a new idea, and the following evening he made a groundwork of branches in the corner of the corral itself, and put down his blankets on the evergreens.  Diablo was much concerned and walked about examining the new work from every angle.  There Bull slept, and the next night he found that during the day the stallion had torn the boughs to pieces and scattered them about.  He patiently laid a new foundation, and after this the bed was left strictly alone.

In the meantime Bull had made a light, strong halter of rawhide, and after several attempts he managed to slip it onto the head of Diablo.  Once in place, it was easy to teach Diablo that he must follow when he felt a pull on the halter—­the first steps were rewarded with dried prunes, and after that it was simple.