At eight o'clock came a wire:

"Not leaving by Hook of Holland route."

Soon after nine:

"Continental mail clear."

Then in rapid succession the great caravanserais reported themselves. Theatres, bars, restaurants, every place in London where men and women gather together, sent, through the plain-clothes watchers, their messages.

At eleven o'clock T. B. was reading a telegram from Harwich when the telephone at his elbow buzzed.

He took up the receiver.

"Hullo," he said curtly.

For a second there was no reply, and then, very clear and distinct, came a voice.

"T. B. Smith, I presume."