oward them at a rapid rate. For an instant the thought flashed across him that it was their own stock that had stampeded. He stuck his head out to see, braving the furious sweep of the stinging sand.
He withdrew it like a tortoise beneath its cover, with a cry that was only half of pain. Through the driving sand he had distinctly seen three enormous forms sweep by, seen like dim shadows in the gloom around. What could they have been? In vain Jack cudgeled his brains for a solution to the mystery.
The forms he had seen drift by had been larger than any horse. So vague had their outlines been in the semi-darkness, however, that beyond an impression of their great size, he had no more definite idea of the apparitions. That they were travelling at a tremendous pace was doubtless, for hardly had he sighted them before they vanished, and he could not have had his head out of its shelter for more than a second or so.
While the lad lay in the semi-suffocation of the saddle, his mind revolved the