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 i…