As one man, the trio whirled. A burly figure loomed in the gloom.

It was the red-headed man!

"Did you buy a pair of binoculars—" the major began.

The other waved him down.

"Sure, I bought 'em. And tonight I used 'em to snag onto the most important military secret I've seen in a month of Sundays. Believe me, mister, I'll make my fortune from this job!"

"Then you admit you're a spy?" the officer rasped, starting to move forward. "You admit you're the dirty dog who murdered our sentry—"

"Sure, sure, I admit it." The burly one seemed unperturbed.

"Why, you—"

"Hold it!" There was a sharp note of command in the red-headed man's voice this time. "Don't come no closer, buddy. Not if you want to keep your health!" He held out one ham-like hand. It gripped a heavy, bottle-shaped package.

"I got a little private lab in my suitcase," the spy explained. "When I saw how simple that formula was, I just brewed me up a batch of your new powder. Now I got it right here"—he waved the package—"complete with detonator. If you guys try to jump me, all I do is let go and the whole works goes off." He chuckled unpleasantly. "I guess you know what happens when two pounds of that stuff lets go."