Once more Herr Muller jumped nimbly aside.

"Dot'll be all righdt," he said amicably, "go on! Go ahead! Some day you break your neck, undt den I take picdgure of you—yes, no?"

He fixed the freckled-faced boy with a glance as he spoke. Herc, despite his usual equanimity, felt a shudder run through him, as he encountered the look. It seemed to penetrate like the white-hot flame of a blow-pipe.

"Whoof!" he exclaimed, as he hastened along, "that chap's about as pleasant a thing to have around as a rattlesnake. He gives me the shivers."

As the Dreadnought Boys hastened to the assembling place, Merritt and Chance, with their machines, emerged. They passed close to Herr Muller, and as they went by he overheard every word they said.

"So Ned Strong is trying to sneak into favor again, eh?" snarled Merritt, who had just been listening to Chance's account of what he had overheard at the hangar window.

"Yes, confound him. I wish we could find some way to put them both out of business. If it wasn't for them, we'd be——"

A soft touch on Chance's arm interrupted him. He faced round and was rather startled to see the shambling figure of Sigmund Muller at his elbow. The man's face bore a peculiar, searching look. Chance felt a sort of shiver run through him as he faced him. But he shook it off.

"Well, what is it?" he demanded gruffly.

"You were talking about Ned Strong and Herc Taylor and some plans they had?" said the photographer in quiet tones.