"Your engine isn't hitting on all four, Hood," Tom interrupted.
They both listened for a minute.
"Guess not," said the driver.
"Wire off, maybe," Tom suggested.
Hood stopped the machine and got out. It would have been more like Tom to jump out and investigate for himself, especially since he had run the old truck long before Hood had ever seen it. But he did not do it. Instead, he remained seated. Hood was right, there was nothing whatever the matter with the engine. He wondered how Tom could have thought there was.
Tom seemed not greatly interested until his companion climbed in, then he craned his neck out and looked down where Hood had been standing.
"All right," he finally said; "I was wrong, as usual."
"I think you're usually right," laughed Hood.
Whatever the cause, Tom seemed thoughtful and preoccupied for the rest of the journey. He whistled some, and that was a sign that he was thinking. Once he seemed on the point of saying something.
"Hood, do you——" he began. Then fell to whistling again.