Alcatraz strove to drive her back, sometimes whirling with teeth bared and rushing at her, sometimes half-rearing as though to strike.

But on such occasions she merely stopped and regarded him with eyes of mild amazement.

She knew perfectly that he would never touched her with tooth or hoof; she also knew that this was dangerous folly--this badgering of terrible man, but since Alcatraz was not wise enough to follow her she must even follow him in spite of his folly.
She stayed half a dozen lengths in the rear, trembling with excitement, for now they passed the verge of the desert and now they entered a man-made road bordered with shining fences of men; what retreat was there if men closed in from the front and the rear?
Yet she went on with dainty and uneasy steps.

As for Alcatraz, he had pressed up boldly, close to the riders, for now the twilight grew thick and it was hard to make out the glimmering forms before him.

Twice he paused; twice he went on.
There was no real purpose in this following.