“Not even the Kings of Egypt with all their climbing camels, and all their speedy, spotted, lucky lizards, ever had a ride like this," he said to his children.

Then something happened. They met another train running on the same track. One train was going one way. The other was going the other way. They met. They passed each other.

"What was it—what happened?" the children asked their father.”

“One train went over, the other train went under," he answered. "This is the Over and Under country. Nobody gets out of the way of anybody else. They either go over or under.”