“Certainly,” replied Dot. “I’m just as anxious to recover the Ladybug as Linda is.”

“It may mean dangerous business.”

“It’s bound to be exciting!”

After dinner Chief Brenan telephoned to the police headquarters to find out what information had been gained. Three autogiros, he learned, had been spotted, but only two of them had been stopped. Neither of these was the Ladybug. The third, it seemed, had been seen early in the day, flying southeast across California toward Arizona. Two secret-service planes had already been sent out in that direction.

With Mr. Eckert’s help, Linda sketched out a course to follow. She would head straight for the city of Yuma, in the extreme southwest of Arizona, stopping there for the first night. Then she would go over the border into Mexico.

Dot, in the meanwhile, took charge of the practical preparations for the trip. She arranged to leave their box of clothing at the hotel, and packed all the supplies for the trip. Water in gallon jugs and thermos bottles, canned food, blankets in case they were forced to camp out at night, field glasses and first-aid kit—and finally, upon Mr. Eckert’s suggestion—a revolver.

The whole party breakfasted at dawn the following morning, and Mr. Eckert accompanied the girls to the airport, to sign the necessary papers for the release of his plane, the Sky Rocket. It was a beautiful new biplane, of the latest model. Painted yellow, with a companion cockpit, it stood in readiness on the runway, as if inviting Linda to climb in and fly.

Her eyes were shining in happy anticipation as she skipped forward and climbed into the cockpit to peer at the instruments. Everything for convenience and comfort seemed to be provided. Altimeter, clocks, compass, parachutes—even a wireless, with transmitting radio wires placed inside the wings, so that messages could be sent and received.

“It’s marvellous, Mr. Eckert!” she exclaimed, as she seated herself at the controls, her hand fingering the joy-stick.

“Aren’t you even going to give her a trial flight, Miss Carlton?” inquired the mechanic, skeptically.