"I was in an aeroplane, my dear—a sort of an unattainable possibility, in fact."

In the meantime, Mortlake, in the Silver Cobweb, had been duly mystified as to what the Golden Butterfly was about when she swooped downward on the steamer. For one instant the thought flashed across him that they were disabled. An unholy glee filled him at the thought. If only the Golden Butterfly were to come to grief right under Lieut. Bradbury's eyes, it would be a great feather in the cap of the Mortlake-Harding machine.

But, to his chagrin, he saw them rise the next instant, as cleverly as ever. Lieut. Bradbury, who had been watching the maneuver of the Golden Butterfly, gave an admiring gasp, as he witnessed the daring feat.

"Good heavens!" he exclaimed, and the evident note of astonishment and appreciation in his tones did not tend to increase Mortlake's self-satisfaction.

"The pesky brats," he muttered to himself; "we've got to do something to put them out of the race. There isn't another American-built aeroplane that I fear except that bothersome kids' machine."

And there and then Mortlake began to hatch up a scheme that in the near future was to come very nearly proving disastrous to Peggy and Roy and their high hopes.

"Magnificently handled, don't you think so, Mortlake?" inquired the naval officer, the next instant.

"Yes, very clever," agreed Mortlake, far too smart to show his inward feelings, or to wear his heart upon his sleeve; "very neat. But I can do the same thing if you'd care to see it?"

The naval officer glanced at the puffy features of his companion and his thick, bull-like neck.

"No, thanks," he said. "I've got to be getting back. There's another type of machine I've got to look over out at Mineola. It is really necessary that I reach there as quickly as possible."