"Hadn't you better get out of here, don't you think?" he said, curtly.

Without a word, McEachern walked to the door, and went out.

Jimmy dropped into a chair with a deep breath. He took up his cigarette-case, but before he could light a match the gong sounded from the distance.

He rose, and laughed rather shakily. He felt limp. "As an effort at conciliating papa," he said, "I'm afraid that wasn't much of a success."

It was not often that McEachern was visited by ideas. He ran rather to muscle than to brain. But he had one that evening during dinner. His interview with Jimmy had left him furious, but baffled. He knew that his hands were tied. Frontal attack was useless. To drive Jimmy from the castle would be out of the question. All that could be done was to watch him while he was there. For he had never been more convinced of anything in his life than that Jimmy had wormed his way into the house-party with felonious intent. The appearance of Lady Julia at dinner, wearing the famous rope of diamonds, supplied an obvious motive. The necklace had an international reputation. Probably, there was not a prominent thief in England or on the Continent who had not marked it down as a possible prey. It had already been tried for, once. It was big game, just the sort of lure that would draw the type of criminal McEachern imagined Jimmy to be.

From his seat at the far end of the table, Jimmy looked at the jewels as they gleamed on their wearer's neck. They were almost too ostentatious for what was, after all, an informal dinner. It was not a rope of diamonds. It was a collar. There was something Oriental and barbaric in the overwhelming display of jewelry. It was a prize for which a thief would risk much.

The conversation, becoming general with the fish, was not of a kind to remove from his mind the impression made by the sight of the gems. It turned on burglary.

Lord Dreever began it.

"Oh, I say," he said, "I forgot to tell you, Aunt Julia, Number Six was burgled the other night."

Number 6a, Eaton Square, was the family's London house.