“WBZA heard from. HRSA awaiting message.”

Mr. Salper, who had been striding up and down, hurried to Bob’s side in answer to the lad’s hail. The other boys were peering eagerly over Bob’s shoulder.

“I’ve reached HRSA and through them H. & D.,” explained the young operator proudly. “H. & D. are waiting for your message.”

“Fine! Fine!” cried Mr. Salper, and his face showed great enthusiasm. “Those are my brokers, Hanson and Debbs. Got ’em right off the reel, didn’t you, boy? Great work! Can you get my message through at once?”

“I don’t know of anything to stop me,” answered Bob. It seemed too good to be true that he had picked up the right station so quickly.

“Send this, then,” Mr. Salper directed. And in a firm hand he wrote down the following message:

“Mohun is a crook and plots to ruin me. Find out his scheme and check him.

Gilbert Salper.”

[CHAPTER XXIII—THE MIDNIGHT CALL]

Skillfully Bob tapped out the message and in an inconceivably small space of time it had been received by the station HRSA and relayed to H. & D. The boys would have been interested if they could have known the sensation caused by the few words.