"Can you tell me what really happened? How did this Varrhus make the berg?"

"It's the simplest thing in the world," said the professor with a smile. "I've managed to duplicate it on a small scale back in my laboratory. Suppose you come back there and I'll show you."

A girl appeared in the doorway with a worried frown on her face.

"Father, has Teddy gone?"

"Yes. We'll hear in about two hours." The professor turned to the reporter with instinctive courtesy. "This is my daughter, Evelyn."

The girl shook hands.

"You want to know about the iceberg, too? Teddy has gone to break it up now."

"To try to break it up," corrected the professor with a smile. "'Teddy' is my assistant."

"But how?" insisted the reporter. "You seem to be so confident, and every one else does nothing but guess."

"I'll show you quite clearly," the professor said gently, "if you'll come back to the laboratory."