Once his gaze concentrated on a spot in the distance.

He detected movement, and watched, motionless, until he was certain.

Half a mile it was to the spot--a low hill, crested with yucca, sagebrush, and octilla--and he saw the desert weeds move, observed a dark form slink out from them and stand for an instant on the skyline.

Wolf or coyote, it was too far for him to be certain, but he watched it with a sneer until it slunk down into the tangle of sage, out of his sight.
He presently forgot the slinking figure; his thoughts returned to Betty.

He did not like her, she irritated him.