“Have you tried it?” asked Tommy, sternly business-like.

“Not yet, but I dope it out that—”

“Nothing on paper; no mouth inventing,” interrupted Tommy, firmly. “Practical experiments.”

“You're right,” said Bill, with moody acquiescence. “I wish to heaven I didn't have to go to the shop. Some things can't be done by one man alone.” He looked at Tommy and hesitated.

Tommy also hesitated. Then he said: “If you think I can help I'll be glad to, Bill. But you must do exactly as you wish. I don't want to pry—”

“You big chump!” interrupted Bill, “I've been afraid to ask you. You know I don't hit it right every time, and you may lose patience with me and—”

“Tut-tut, me child!” said Tommy.

“Well, I'm only warning you.”

“Bill, I'd like to talk all night, but I guess we'd better go to bed.”

“I sha'n't sleep a wink all night,” Bill spoke accusingly.