Lance clasped Douglas' hand, and leaped into the snug, enclosed cockpit. The four motors bellowed as the thin-sprayed oil cascaded to them. The helicopter props spun around.

"Go to it, kid!" cried Douglas. "Spy or no spy, you're coming out on top! And give Hay a last handshake for me!"

And he swung to the salute.

Lance extended his hand. Then he gave his ship the gun, and the tiny, streamlined scout teetered, roared, and rose with a scream into the dripping darkness high above.

The Torpedo Plan had started.

PART IV

ance hung for a moment at one thousand feet. A crack of lightning lit the base below for a second, and he perceived the colonel's straight figure with hand outstretched. Lance grinned, and gunned to forty thousand—an easy flying height, with his superchargers pumping and air-rectifiers normalizing the enclosed pilot's seat.

"But what," he wondered, as he stopped the helicopters, "did he mean by 'give a last handshake'?"

He was soon to find out.