They were so excited about this new development which they had stumbled upon purely through accident that they sat talking about it for a long time until Bob chanced to look at his watch.

“Just have time for the last selection,” he remarked, as he reconnected the aerial. “We’ll wind up in the regular way this time. It’s an aria from Lucia and I don’t want to miss it.”

He had some difficulty in making his adjustment, as there was a lot of interference at the moment.

“Raft of amateurs horning in,” he muttered. “All of them seem to have chosen just this time to do it. I wonder——”

He stopped as though he had been shot, and listened intently. Then he beckoned to the others to adjust their headphones.

Into the receiver was coming a succession of stuttering sounds that eventually succeeded in framing intelligible words. Ordinarily this might have provoked laughter, but not now. They had heard that voice before.

It was the voice of Dan Cassey!


CHAPTER IV