“There’s plenty of room here for three,” Peter Ruff said, cheerfully, as they sat on either side of him. “Drive slowly, please, chauffeur. Now, Mr. Lemprise,” Peter Ruff added, “we will trouble you to change places.”

“What do you mean?” the man called out, suddenly pale as death.

He was held as though in a vice. John Dory’s arm was through his on one side, and Peter Ruff’s on the other. Apart from that, the muzzle of a revolver was pressed to his forehead.

“On second thoughts,” Peter Ruff said, “I think we will keep you like this. Driver,” he called out, “please return to the Court at once.”

The man hesitated.

“You recognize the gentleman who is with me?” Peter Ruff said. “He is the detective from Scotland Yard. I have full authority from Lord Clenarvon over all his servants. Please do as I say.”

The man hesitated no more. The car was backed and turned, the Frenchman struggling all the way like a wild cat. Once he tried to kick the hatbox into the road, but John Dory was too quick for him. So they drove up to the front door of the Court, to be welcomed with cries of astonishment from the whole of the shooting party, who were just starting. Foremost among them was Sogrange. They crowded around the car. Peter Ruff touched the hatbox with his foot.

“If we could trouble your Lordship,” he said, “to open that hatbox, you will find something that will interest you. Mr. Dory has planned a little surprise for you, in which I have been permitted to help.”

The women, who gathered that something was happening, came hastening out from the hall. They all crowded round Lord Clenarvon, who was cutting through the leather strap of the hatbox. Inside the silk hat which reposed there, were the Clenarvon diamonds. Monsieur le Marquis de Sogrange was one of the foremost to give vent to an exclamation of delight.

“Monsieur le Marquis,” Peter Ruff said, “this should be a lesson to you, I hope, to have the characters of your servants more rigidly verified. Mr. Dory tells me that this man came into your employ at the last moment with a forged recommendation. He is, in effect, a dangerous thief.”