“Message for you! Man gave me a dollar to deliver it just as you started,” panted the boy.

Then, before he could answer, though he had an ominous feeling, Tom felt the car being lifted off the ground. The airline express had started!

CHAPTER XVIII
CHICAGO

Strange and mingled were the feelings Tom Swift had as his great experiment was started. There was exultation mingled with apprehension. Exultation that he had at last triumphed over many difficulties and the plots of his enemies and had reached the point of starting the service which might revolutionize travel. Apprehension lest he might fail, and also apprehension over this latest happening—the giving to him of this note.

It had a sinister appearance—this hasty message delivered in such a manner. It was in keeping with some other things that had happened of late.

But Tom’s chief concern now was to see that his new craft got safely into the air and on its way. He could deal later with those who sought to steal from him the fruits of his labor and his brain.

So, overcoming his natural curiosity to see what the note contained, Tom resolutely thrust it into his pocket and gave his whole attention to directing the management of the Falcon, which was the plane and accompanying car selected to hop off on the first leg of the transcontinental trip. The other planes were named, respectively, the Eagle and the Osprey.

This last name was chosen by Tom as fitting for the plane in which he hoped to ride when he sighted the Pacific coast and ocean. For the osprey is a fish-hawk, and Ned agreed with Tom that it was a most appropriate name for a craft in which they hoped to sight an ocean with its millions of fish.

Tom, together with Ned, Mr. Damon, and some assistants, rode in the hanging car, while in the cockpit of the aeroplane above them were Harry Meldrum and Bert Dodge, the two able mechanicians. Once he had seen for himself how the car behaved, Tom intended to take his shift in the cockpit, piloting the plane part of the time.

Tom had invited Mr. Jacks to make the first trip, but the eccentric millionaire, whose money had enabled the initial planes to be finished and who had promised to invest a hundred thousand dollars more in case Tom could successfully complete six round trips, had smiled as he shook his head.