"Relax, Nan," he said, his words colored by the lingering laughter. "It's only air; nasty old air."

The girl patted her short hair back into place. "I wish you wouldn't fly this low," she said, half-frightened.

"Low? Call this low?" Ish teased. "Here. Let's drop it a little, and you'll really get an idea of how fast we're going." He nudged the wheel forward, and the Navion dipped its nose in a shallow dive, flattening out thirty feet above the mangrove. The swamp howled with the chug of the dancing pistons and the claw of the propeller at the protesting air, and, from the cockpit, the Everglades resolved into a dirty-green blur that rocketed backward into the slipstream.

"Marty!"

Ish chuckled again. He couldn't have held the ship down much longer, anyway. He tugged back on the wheel suddenly, targeting a cumulous bank with his spinner. His lips peeled back from his teeth, and his jaw set. The Navion went up at the clouds, her engine turning over as fast as it could, her wings cushioned on the rising thrust of another thermal.

And, suddenly, it was as if there were no girl beside him, to be teased, and no air to rock the wings—there were no wings. His face lost all expression. Faint beads of sweat broke out above his eyes and under his nose. "Up," he grunted through his clenched teeth. His fists locked on the wheel. "Up!"

The Navion broke through the cloud, kept going. "Up." If he listened closely, in just the right way, he could almost hear ...

"Marty!"

... the rumble of a louder, prouder engine than the Earth had ever known. He sighed, the breath whispering through his parting teeth, and the aircraft leveled off as he pushed at the wheel with suddenly lax hands. Still half-lost, he turned and looked at the white-faced girl. "Scare you—?" he asked gently.

She nodded. Her fingertips were trembling on his forearm.