"No!" said Moran.

Sparks said patiently, "Well, I didn't mean us here in this room. Of course we ain't. But I mean the people of our time."

"And I still say," said Moran gravely, "no! Man in all ages is a creature of conceit, self-pride, self-glorification. There was space-flight long before you lived, Sparks. A race, long dead now, from a neighbor planet."

I said gently, "You're thinking of those pyramids found on Venus and Mars, Moran? I know that's a puzzler to modern science. And I've read several theories regarding their builders. But most authorities agree that their mere presence does not necessarily imply the existence of a single race of engineers. The pyramid is a fundamental structural form. Any intelligent race—"

"Man," said Moran almost sadly. "Man the dreamer; Man the doubter. No, Lieutenant, I am not speaking of theories, now. I am speaking of tales I've heard; accounts I've read in archives long molded into dust. At least three times in the past have civilized races spanned the void. It was the dying Martian race that first achieved space-flight. They found Venus a rank and stinking jungle, but on Earth certain of them set up their new abode." He smiled quietly. "And reverted to savagery, as is always the case when civilized men, removed from the source of their culture, find themselves face to face with stark reality.

"Then it was the Moon-creatures who fled their airless world, spanned the distance to nearby earth."

I said, "That's an interesting thought, Moran. It explains the coloration of the races of man, doesn't it? I'd like to read that book you mentioned. Where can I get it?"

He shook his head sadly.

"You can't, Lt. Brait. The last copy of it was destroyed more than twelve centuries ago. Simon Magnus was the last man to read it as I remember. I loaned it to him—"

He stopped abruptly. But Sparks' eyes were plate-sized and incredulous. "—you loaned it to him?"