“You and Joe Mudd are neck and neck. It would be good for the winner, and good for aviation, if you raced right down to the wire. Whatever you’ve done wrong, it doesn’t change the fact that you’ve driven a flying machine across the continent. Why don’t you sleep on it? Meantime, I’ll let Marco work on the machine overnight.”

MARCO CELERE SAW a way out of his predicament. Rather than wait helplessly for Josephine to change her mind, and fearing she would not, he placed a long-distance call from the hotel telephone. Preston Whiteway snatched up his telephone like a man who had been waiting all night for news from Fresno. “Will she fly?”

“This is Marco Celere, inventor of your aeroplane and chief mechanician.”

“Oh. . Well? Will she fly?”

“I understand,” Celere answered suavely, “that Mr. Bell is discussing it with her over breakfast. There’s time still – there’s a low fog on the field the sun hasn’t burned off yet. But I have a suggestion. If Josephine cannot win the Whiteway Cup, surely her flying machine can.”

“What are you talking about?”

“If she doesn’t agree to finish the race, I will fly the last leg from Fresno and win the race for her.”

“Against the rules. One driver, one machine, all the way.”

“We are men of the world, Mr. Whiteway. They are your rules. The Whiteway Cup is your race. Surely you can change your own rules.”

“Mr. Celere you may know something about building flying machines, but you don’t know the first thing about newspaper readers. They’ll buy any lie you print – unless it’s a lie about something you’ve already convinced them to love. They love Josephine. They want her to win. They don’t give a hang about your flying machine.”

“But it would be so good for aviation-” Celere pleaded.

“And even better for you. I wasn’t born yesterday.”

The telephone banged dead in Celere’s ear.

Celere listened outside the hotel dining room. He heard Bell speaking urgently. Then he heard Josephine say loudly and clearly, “No.”

Celere hurried out on the field to his monoplane. The fog was still heavy, and he could barely see Joe Mudd’s and Isaac Bell’s machines. Josephine’s Van Dorn mechanicians were watching him suspiciously even though he had been guiding their efforts since Yuma, Arizona.

“We should start the motor,” he said.

“Why? She’s not going anywhere.”

“Mr. Bell is very persuasive. He still may convince Josephine to change her mind. Let us fill her tanks, spin her motor, and make it warm for her.” They exchanged glances. Celere said, “I don’t see Joe’s Mudd’s mechanicians hanging about this morning. They’ll be ready to go when the fog lifts. Shouldn’t we be? Just in case?”

That got them going. It was after all a race, and though they were better detectives than mechanicians, they had been competing daily for forty-eight days and four thousand miles.

“Start fueling. I will be right back.”

He went to the tiny stateroom they had given him on the train and returned carrying a yard-long, six-inch-wide corrugated paper tube sealed at either end and shoved it into the driving nacelle.

“What’s that?” asked a detective.

“San Francisco Inquirer flag, which Josephine is supposed to wave when she lands at the Presidio. What is wrong with motor?”

“What do you mean?”

“I do not like the sound.”

“Sounds fine to me.”

Celere looked the detective-mechanician in the eye. Then he flashed his most winning smile. “Let us make a deal, you and me, sir. I will not arrest criminals. You will not tell me that a flying-machine motor sounds like it will not suddenly stop in the sky.”

“Sorry, Celere. You’re right. What do you hear?”

“Bring me soapbox.” He climbed on the box and into the nacelle and played with the throttle, revving and slowing the Antoinette. He cocked his ear, shaking his head in puzzlement. “Pull chocks. Let’s taxi her around a little.”

“Careful you don’t run into anything. Can’t see fifty feet.”

The mechanicians pulled the wooden blocks that were holding the wheels in place.

Celere revved the motor. “You hear? You hear?”

“I’m not sure.”

“Listen. . Here, I make go faster.”

He opened the throttle all the way. The Antoinette’s crisp burble increased to a roar. He turned the rudder, shaped the wings, raced fifty yards along the grass, and soared into the fog.

BELL ORDERED his Eagle made ready to fly, but there was no following Celere in the fog because no one knew which way he had gone. He had to wait until some railroad dispatcher wired a report that he had been spotted. Nearly an hour later, Isaac Bell received a telephone call from the railroad detectives Tom Griggs and Ed Bottomley.

“Are you sure you got Harry Frost?”

“I laid him personally on a slab of ice in the Fresno police station.”

“Yeah, well, we just had our second dynamite robbery in two days. Fellow walked into our Merced shop with a coach gun, terrorized the poor old clerk into loading two hundred pounds of dynamite, detonators, and ice tongs on a track inspector’s handcar, and pumped off. We found the handcar three miles down the line next to an empty hayfield. Not a trace of the fellow or the dynamite or the ice tongs.”

“Ice tongs?” Bell echoed, mystified. “What else did he take?”

“Isn’t two hundred pounds of dynamite enough?”

“What else?”

“Hold on!. . Hey, Tom, Mr. Bell wants to know did he take anything else. . Oh yeah. Tom says he took a flashlight and some electric cable.”

“What kind of detonators? Fulminate of mercury?”

“Electric.”

“Did you find any truck or wagon tracks?”

“That’s the funny thing. The only wheel tracks were out in the middle of the field. Nothing by the road except footprints. Strange, don’t you think?”

“Not if he came and left on a flying machine!”

“Oh. Never thought of that. . You still there, Mr. Bell?”

Isaac Bell was running to his American Eagle. “Spin her over!”

The Gnome’s urgent Blat! Blat! Blat! caused Joe Mudd to turn aside and let Bell take off ahead of the Liberator. Bell picked up the Southern Pacific tracks and headed north toward San Francisco. He had less than two hundred miles in which to catch up with Marco Celere.

The stolen electric detonators, the flashlight, and the electric cable were the clues that told Bell exactly what Marco Celere intended to do. He had stolen the ingredients to make an aerial bomb with an electric detonator. Fulminate of mercury detonators that exploded on contact would be deadly on a flying machine that bounced as it took off from the ground and was battered sharply by air currents in the sky. Any sudden motion would make them detonate the dynamite and the flying machine with it.

But an electric detonator could be controlled by a simple switch between the flashlight batteries and the detonators. As long as the switch was off, the dynamite was safe. Switch it on, and the dynamite would explode.

Celere would have fashioned it to be moved into the on position after it was dropped – then only when it fell on its target. He would have installed two switches, one to make the bomb ready at the moment he was ready to drop, the second that would cause the explosion on impact.

Bell could not imagine why Celere had taken ice tongs.

But the rest was clear. Whiteway had refused to let him demonstrate that his machine could win the race, even without Josephine, leaving Celere with no way to prove to the Italian Army that his aeroplane could be a war machine.