“It’s that rascal’s work! He fired on me, and then came out here after Mart. He has abducted the boy!”

As we know, Leo was partly right and partly wrong.

The young gymnast realized that if he was to act he must do so without delay.

It made him very angry to think of the young lad being in the old balloonist’s power.

That he would ill-use Mart he felt certain.

From where he had found the bottle Leo traced Porler’s footsteps to the carriage.

The marks of the carriage wheels were still fresh and they ran straight into the city.

On the pavements they were, of course, lost.

Leo was in a quandary.

He told Greson of what he had discovered, and then both of them began a systematic search for Mart.