“Yes, and the difference between a pylon and aileron. And a lot of other things. And I’m going to learn a heap more,” declared Hiram confidently.

“Then you’ve begun your education already, have you?”

“The man Mr. King sent me to hired me right on the spot. There isn’t much to do here, but I’m to go with his crew to Dayton, and so all around the circuit. Six dollars a week, and keep and commission.”

“What doing?”

“Helping in the restaurant and peddling novelties. I can’t be idle, so I’m trying to start an honest penny rolling among the stragglers around the grounds,” and Hiram tapped the box under his arm.

“What have you got there?” inquired Dave.

“Souvenirs,” explained Hiram, opening the cover of the box and displaying a lot of pins and buttons bearing or stamped with miniature airships.

“You’ll do,” declared Dave heartily, “and thank you for sending that Dawson fellow about his business.”

“All right, and you look out for him. He’ll do you some mischief if he can.”

Dave went on his way with a word of good cheer to Hiram. He felt that they were bound soon to meet again, and prized the manly qualities of this new acquaintance. As he neared the hangars two automobiles flashed past him.