“I never saw him with a friend. I don’t know if he ever had any. He kept to himself. Completely to himself.”

“I encountered some Chicago men at your camp yesterday. I had the impression they were living there.”

“They’re just bodyguards. Harry kept them around for protection, but he never had anything to do with them.”

“Protection from what?”

She made a face. “His ‘enemies.’”

“Who were they?”

“I asked him. Once. He started screaming and hollering. I thought he would kill me. I never asked again. They’re in his head, I think. I mean, he was in the nuthouse once.”

Bell gently changed the subject. “Did he ever take friends when he went big-game hunting? Did he shoot with a party?”

“He hired guides and bearers. But otherwise he was alone.”

“Did you go with him?”

“I was busy flying.”

“Did that disappoint him?”

“No. He knew I was flying before we married.” Her eyes tracked a Blériot swooping past at sixty miles an hour.

“Before? May I ask how you got started in flying?”

A high-spirited grin lighted her open face. “I ran away from home—stuffed my hair under a cap and pretended to be a boy.” It wouldn’t be hard, thought Bell. She didn’t look like she weighed over a hundred pounds.

“I found a job in a bicycle factory in Schenectady. The owner was building flying machines on the weekend, and I helped him with the motors. I knew all about them from fixing my dad’s farm machinery. One Monday, instead of going to work, I snuck out to the field and flew the machine.”

“Without lessons?”

“Who was there to teach me? There weren’t any schools back then. Most of us learned on our own.”

“How old were you?”

“Seventeen.”

“And you just climbed on the machine and flew it?”

“Why not? I could see how it worked. I mean, all it is, really, is the aeroplane goes up by pushing the air down.”

“So with no formal training,” Bell smiled, “you proved both Bernoulli’s theorem and the existence of the Venturi effect.”

“What?”

“I only mean that you taught yourself how to shape the wings to create the vacuum over the wing which makes it rise.”

“No,” she laughed. “No, Mr. Bell. Venturi and all that is too complicated. My friend Marco Celere was always rattling on about Bernoulli. But the fact of the matter is, the flying machine goes up by pushing the air down. Warping the wings is just a way to deflect the air away from where you want to go—up, down, around. Air is wonderful, Mr. Bell. Air is strong, much stronger than you think. A good flying machine like this one—” She laid an affectionate hand on its fabric flank. “Marco’s best—makes the air hold you up.”