"Oh! Excuse me, Tom," he said, "I didn't know you had company." And he was about to withdraw.

"Don't go, father," said Tom. "You will be as much interested in this as I am. This is Mr. Gunmore, of the Eagle Park Aviation Association. This is my father, Mr. Gunmore."

"I've heard of you," spoke the secretary as he shook hands with the aged inventor. "You and your son have made, in aeronautics, a name to be proud of."

"And he wants us to go still farther, dad," broke in the youth. "He wants me to build a specially speedy aeroplane, and race for ten thousand dollars."

"Hum!" mused Mr. Swift. "Well, are you going to do it, Tom? Seems to me you ought to take a rest. You haven't been back from your gold-hunting trip to Alaska long enough to more than catch your breath, and now—"

"Oh, he doesn't have to go in this right away," eagerly explained Mr. Gunmore. "There is plenty of time to make a new craft."

"Well, Tom can do as he likes about it," said his father. "Do you think you could build anything speedier than your Butterfly, son?"

"I think so, father. That is, if you'd help me. I have a plan partly thought out, but it will take some time to finish it. Still, I might get it done in time."

"I hope you'll try!" exclaimed the secretary. "May I ask whether it would be a monoplane or a biplane?"

"A monoplane, I think," answered Tom. "They are much more speedy than the double-deckers, and if I'm going to try for the ten thousand dollars I need the fastest machine I can build."