"It would be a fine introduction of the machine to the tests at Fort Myer if it could be said that the aëroplane sailed for two hundred miles over a straight-away course!"

Matt's face glowed at the thought. To do something different, something daring that would advance the science of aviation, that would certainly be worth while.

"Besides this," pursued Matt earnestly, "I'll have an advantage over Murgatroyd and his villainous helpers. They will not be expecting a rescue through the air, while they may be prepared to ward off one by automobile. It is not impossible," he finished, with a trace of enthusiasm, "that I may be able to pick Mrs. Traquair up and bring her to Fort Totten in the aëroplane. Think of that! She would be rescued by her husband's invention."

"You wouldn't get her to ride in that aëroplane in a thousand years," declared McGlory. "She's scared of it, and has been even before her husband was killed. Shucks! Give it up pard, and go with us in the automobile."

Matt shook his head.

"I'm going in the machine," he answered. "You fellows can follow in the automobile."

"Follow! Speak to me about that. Why, pard, if the automobile is any good at all we'll lead you all the way to Wells County."

"Not if there's no wind, or only a very little. I figure that the new aëroplane can do better than sixty miles an hour. But let's get busy, Joe; there's more work to be done."

Cameron left at once to go across the lake and secure an automobile, Ping proceeded to get supper, and Matt and McGlory put their finishing touches on the aëroplane's motor.

"Here's a thing you haven't thought of, pard," remarked McGlory, when the last bolt had been tightened, "and that's about sending this machine to Washington. If anything happens to it, or if you're delayed in Wells County, there's fifteen thousand gone up the spout."