Bob, without hesitation, rushed his bicycle into the highway and pedaled after the motorcycle for all he was worth. Griff was too intent on his purpose to notice, he felt sure.

It would be a losing race, Bob feared, unless Griff overtook that rapidly receding car very soon. Muscles could not endure against a machine! Nevertheless Bob rode as fast as his pedals would turn.

As he sent the wheels spinning along it crossed his mind that Lang would be arriving at the plant almost any moment but he kept on all the same.

“It will take Lang awhile to warm up the engine, and, anyway, if I don’t go with him I know another way to communicate with father,” he decided.

The car was almost out of Bob’s sight, the motorcycle was rapidly overtaking it.

At that instant Bob’s heart almost stopped beating!

Far ahead, on a cross road, he saw a huge truck come into view. It was not only between the car and its pursuer; it was also well onto the road and almost directly in front of the motorcycle.

“Griff!” Bob shouted, without thinking that his voice would never be heard. He instinctively cried a warning. If the rider had his head low over his handlebars!——

His coaster brake jammed on, Bob slowed, alighted, his muscles refusing to function for the instant.

But during that instant Griff evidently saw the huge obstacle and swerved. In making the wild curve to go around the rear of the truck Bob saw the youth and cycle go off the road into the ditch.