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The wheels, axles, main connecting rods and valve gear had been connected. I knew I had a chance, at least, if I could complete the job before the general foreman came to work in the morning. The rocker arm was put in its middle position. Then the valve stem was adjusted until it was in the center of the valve face. I placed the crank on the forward center, and the full part of the forward-motion eccentric above and that of the backward-motion eccentric below the axle. To fasten them temporarily, I tightened up the set screws and threw the link down until the block came nearly opposite to the end of the eccentric rod. It gave me satisfaction when I realized this was a puzzle I could work!

I was so intent on solving it that it startled me when Darling crawled under there and stood beside me. It was midnight; he had come back to check me up.

He ticked off what I had done. There was another helper there, but he was younger and just a little dumb.

"You're all right, Walt." Darling slapped me on the back. "I'm going back uptown. Around three o'clock I'll be back and take a look."