CHAPTER XVIYou may not believe this next incident. I know I did not, when Casey told me about it,--but now I am not so sure. Casey said that the light appeared again, that night, moving slowly along the lip of the canyon like a man with a large lantern. There was a full moon, which had made him decide to travel at night on account of the heat while the sun was up. But the moon did not reveal the cause of the light, though the canyon crest was plainly visible to him.
William swung away from that light and walked rather briskly in the other direction, and Casey did not argue with him. So they headed almost due west and kept going. It seemed to Casey once or twice that the light followed them; but he could not be sure.
Two full nights he journeyed, and on both nights he had the light behind
