"All right," said George, darkly; "that'll do. What I know, I know."
"What's the mystery?" asked Gray. "You'd better get it off your chest, if it's anything important."
"It is important," said George, with a frown. "And what I would do is to advise a certain party to be careful. I don't want to do any spying, but duty's duty."
Gray changed colour, and proceeded with his steak; while George buried himself in the columns of the Daily Telegraph, and preserved a countenance of Spartan-like severity.
Having finished his meal, George coolly took out a notebook and proceeded to make a few entries. He could see that Gray was watching him narrowly, and he purposely endeavoured to put more secrecy into the performance.
When it came to settling up, George had some difficulty in finding the cash, although it was only in his right-hand pocket.
"Funny thing," he said; "I had a half-sovereign a little while ago."
The waiter stood by stolidly with the bill on a salver.
"Would you care to take this?" said Gray, meekly, pushing forward a half-sovereign from among his change. "I dare say you'll find it presently."
"Thanks," said George. "I'll settle up with that, and give it to you as we go along. I shall find it," he said in a determined voice.