"Tell me about this, won't you?" said the reporter briskly. "I'll catch the devil from the city editor for missing out on that part of it, but if you'll give me the full story——"

"What's your paper?"

The reporter told him.

"That's all right," said Teddy easily. "They were calling extras of that paper as I came uptown. The professor has told you the theory of the thing?"

"No," said Evelyn. "He was starting to, but the black flyer appeared and shot down the other aëroplane, and father was so much upset that he couldn't go into details. Was the pilot of the aëroplane killed?"

Teddy nodded.

"Frozen, poor chap. He never knew what struck him."

"What did happen?" asked the reporter again. "You people seem to take this so much as a matter of course, and no one else can do anything but guess."

"The professor knows more about low temperatures than any other man in the world," explained Teddy. "It's only natural that he should be fairly certain of his facts."

He smiled at the professor as the old man made a deprecating gesture.