"Wow! but that was a close one," he muttered. "Don't know who my heavy friend was but he sure wanted to detain me for some reason or other. But say!" he mused; "how about that girl? Hope I didn't get her in bad by flashing that light on her hand.

"But then," he thought more soberly, "perhaps she is the principal bad one. Perhaps she is whispering on 200 just to mislead me. Who knows? You've got to be wise as a serpent when you play this game, that's what you've got to be. There's just two kinds of radio detectives, the quick and the dead." He chuckled dryly.

"Well, I guess Coles Masters will think I'm one of the dead ones if I don't rush on."

Hurrying to the next street, he boarded a car to make his way back to the secret lower room.

During his absence things had been happening in the mysterious radio world that hangs like a filmy ghost-land above the sleeping world.


CHAPTER IV

A GAME FOR TWO

As Curlie slipped noiselessly through the door into the secret tower room, he was seized by the arm and dragged into his chair.