Mortlake could hardly conceal a smile. His plan to ruin Roy was working to perfection. In his imagination he saw the Prescott aeroplane eliminated as a naval possibility, and the field clear for the selection of the Mortlake machine. Mentally he was already adding up the millions of profit that would accrue to him.

Lieut. Bradbury left that meeting heavy of heart. Mortlake's story had been so circumstantial, so full of detail, that it hardly left room for doubt. And then, too, he had offered to produce positive proof, to allow the officer to witness the actual transaction.

"Good heavens, isn't there any good in the world?" thought the officer, as the hack in which he had driven out to the Mortlake plant drove him back to the village. Mortlake had agreed to call for him at the little hotel at eight o'clock. The hours till then seemed to have leaden feet to the anxious young officer.

It was shortly before this that Roy, returning from an errand in town in the Prescott automobile, was halted at the roadside by a figure which stepped from the hedge-row, and, holding up a cautioning finger, uttered a sharp:

"Hist!"

Roy, turning, saw a man, seemingly a workingman, from his overalls, at the side of the machine.

"What is it? What do you want?" demanded Roy.

"I have a message for you," said the man, speaking in a slightly foreign accent; "you are in great danger. Your enemies plot it."

"My enemies!" exclaimed Roy.

"Yes, your enemies at the Mortlake factory."