You 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.