The woman took up the second pair of head-’phones, twisted the steel band and, instead of placing the ’phones over her head, put the ear pieces to her ears with the arched band towards her face—a favourite attitude with women who listen to wireless telephony.

As the delicate receivers came to her ears she drew a long breath, the colour dying from her face.

The little room wherein the fine expensive experimental set was installed was on the ground floor of a good-sized, old-fashioned house called “Willowden,” which stood behind a broad lawn just off the Great North Road between Hatfield and Welwyn, twenty-five miles from London, a distance which was as nothing to Gordon Gray with his up-to-date Rolls.

From the Automobile Club in Pall Mall he could easily reach home in half an hour, even though the traffic through North London was usually bad. That night he had taken Freda to the theatre, and they had had supper at Ciro’s afterwards, and it was now only one o’clock in the morning.

“Listen, old thing?” she urged, as she again adjusted the telephones on her ears. “What’s that?”

Gordon Gray listened attentively.

A deep harsh voice was heard—a Voice from Nowhere—which asked slowly and very distinctly:

“Who was that who is interested in 3.X.Q.? This is 3.A.X. at Carlisle calling. Who are you, Freda? Please tell me who you are! Roddy Homfray, 3.X.Q., is well, but I fear he may not be listening. Can I relay any message, Freda?” asked the voice.

“Curse you!” cried the man. “You’ve actually given your name broadcast over the whole country! What the devil do you mean?” he cried, glaring at her. “All wireless amateurs know 3.X.Q. as old Homfray’s son. They will inquire after Freda, and then old Homfray will know! Gad! You’ve made an unholy mess of things now! Put those ’phones down and be quiet!” he added.

Then, as she disentangled the head-’phones from her hair, he pulled over the transmitting switch, and as the generator began to gather speed until it hummed pleasantly and the two big globular valves being aglow, he said, in a forced, unnatural voice: