"Is it hocus-pocus, Godfrey?" I asked, at last. "If it is, it's a mighty artistic piece of work."

"And if it isn't hocus-pocus, what is it?" Godfrey retorted. "A spiritual manifestation?"

I confess I had no answer ready. Ideas which seem reasonable enough when put dimly to oneself, become absurd sometimes when definitely clothed with words.

"There are just two possibilities," Godfrey went on. "Either it's hocus-pocus, or it isn't. If it is, it is done for some purpose. Two men don't go out on a roof every night at midnight and fire off a Roman candle and wave their arms around, just for the fun of the thing."

"It wasn't a Roman candle," I pointed out. "A Roman candle is visible when it's going up, and bursts and vanishes at the top of its flight. That light didn't behave that way at all. It formed high in the air, remained there stationary for a moment, gradually grew brighter, and then started to descend. It didn't fall, it came down slowly, and at an even rate of speed. And it didn't drift away before the breeze, as it would have done if it had been merely floating in the air. It descended in a straight line. It gave me the impression of moving as though a will actuated it—as though it had a distinct purpose. There was something uncanny about it!"

Godfrey nodded thoughtful agreement.

"I have felt that," he said, "and I admit that the behaviour of the light is extraordinary. But that doesn't prove it supernatural. I don't believe in the supernatural. Especially I don't believe that any two mortals could arrange with the heavenly powers to make a demonstration like that every night at midnight for their benefit. That's too absurd!"

"It is absurd," I assented, "and yet it isn't much more absurd than to suppose that two men would go out on the roof every night to watch a Roman candle, as you call it, come down. Unless, of course, they're lunatics."

"No," said Godfrey, "I don't believe they're lunatics—at least, not both of them. I have a sort of theory about it; but it's a pretty thin one, and I want you to do a little investigating on your own account before I tell you what it is. It's time we went to bed. Don't get up in the morning till you're ready to. Probably I'll not see you till night; I have some work to do that will take me off early. But Mrs. Hargis will make you comfortable, and I'll be back in time to join you in another look at the Roman candle!"

He uttered the last words jestingly, but I could see that the jest was a surface one, and that, at heart, he was deeply serious. Evidently, the strange star had impressed him even more than it had me—though perhaps in a different manner.