He thought it was because Dade was boyish and impulsive.
Whatever it was, he knew of its existence.

It was not a deep feeling; it was like the emotion that moves a large animal to permit a smaller one to remain near it--a grudging tolerance which may develop into sincere friendship or at a flash turn into a furious hatred.

And so Dade's security depended entirely upon how he conducted himself.

If he kept out of Calumet's way, all well and good.

But if he interfered with him, if, for instance, he became too friendly with Betty, there would come an end to Calumet's tolerance.
And so there was a glint of speculative distrust in Calumet's eyes as he sat and watched Dade ponder.