"That's right." Banner knitted his brow. He began to explain the details of conception as it occurs in man—the biology of ova and spermatazoa, the differences between the anatomy of the sexes, and the reasons for those differences. He drew, first, a botanical analogy. Hugo listened intently. "I knew most of that. I've seen—girls."

"What?"

"Some of them—after school—let you."

Danner was surprised, and at the same time he was amused. He had forgotten the details of his young investigation. They are blotted out of the minds of most adults—to the great advantage of dignity. He did not show his amusement or his surprise.

"Girls like that," he answered, "aren't very nice. They haven't much modesty. It's rather indecent, because sex is a personal thing and something you ought to keep for the one you're very fond of. You'll understand that better when you're older. But what I was going to tell you is this. When you were little more than a mass of plasm inside your mother, I put a medicine in her blood that I had discovered. I did it with a hypodermic needle. That medicine changed you. It altered the structure of your bones and muscles and nerves and your blood. It made you into a different tissue from the weak fibre of ordinary people. Then—when you were born—you were strong. Did you ever watch an ant carry many times its weight? Or see a grasshopper jump fifty times its length? The insects have better muscles and nerves than we have. And I improved your body till it was relatively that strong. Can you understand that?"

"Sure. I'm like a man made out of iron instead of meat."

"That's it, Hugo. And, as you grow up, you've got to remember that. You're not an ordinary human being. When people find that out, they'll—they'll—"

"They'll h