“Ay, ay, sir.”

“Hold her hard, then.”

Signal to the engine room: “Slow speed.”

Roque summoned the boys with imperious motion.

“Take the air; bring signal red, if English warship; signal white, if French cruiser; and signal black, if channel steamer. Get away!”

Four sailors manned the runway—first Billy shot the chute; then Henri, a moment later. A clean leap, and off they went.

The steamer they left logged lazily, drifting, waiting.

The aviators guided the flight toward the thin spiral of smoke penciling a point on the horizon. The air was as clear as a bell.

With no fixed notion of what purpose they were serving, the aviators exulted only in the joy of air conquest. The machines were keyed up like a watch—that is, perfection—and could be directed to a hairline.

The smoke spiral was rope-sized, then body-round, then a column.